Does anybody understand what could be the reason why my defective product return parcel is stuck in China for >8 months?

As I interpret the tracking records (see below):
China Customs has released my parcel and handed it to the carrier
The parcel has been returned twice - By whom? And to Where? Back to my country? After >4 months I still haven't received it.
Could it be that Banggood is providing wrong address/phone/ignoring/sabotaging any attempts by China Post to deliver the parcel and that's why the parcel gets returned?
And what should I do now?

I returned a waterdamaged "waterproof" smartphone back to the Banggood (in China) after their Contact/Ticket service agreed that I should return the defective product and they will issue a full refund afterwards.

Banggood provided me with this address and phone number:
Address: EWORLDHOME LIMITED, Dongguan Chuanjing electric machinery factory, No.20 Qinglong Road, Huangjiang Town, Dongguan City, 523750, CHINA
Phone number: 18029062289

I filled and attached the customs declaration myself:
Detailed description of contents: Water damaged smartphone Ulefone Power Armor 13 with shockproof case. Water damaged "waterproof" smartphone. Paid 302.86 USD = 287.88 EUR. Current value 0.00 USD (non-functional).
Value (EUR): 287.88
HS tariff no.: 851711
Country of origin: China
P.S. I didn't pay any customs duty because according to my information - I didn't have to. The Latvia Post office (in my home country) looked at the declaration and confirmed that it looks fine.

After the last tracking record ("Returned, Remarks: Returned") I contacted both Banggood and Latvia Post but unsuccessfully:
Banggood Contact/Ticket service replied that they haven't received the package (but it's seems more like an AI chatbot): "LA901188868LV, we are sorry for the inconvenience of logistics showing that your package has been returned. We recommend that you first contact the carrier to confirm the status of your package."
I asked the Latvia Post but they didn't even try to explain other than "it's not our responsibility anymore".


Tracking code: LA901188868LV

China Post, Synchronization time: 2023-03-09 14:39:29 (GMT+02:00)
2022-11-02 11:12 Guangzhou, [Guangzhou International Exchange Bureau] Returned, Remarks: Returned
2022-11-01 15:25 Guangzhou, leave【Guangzhou International Exchange Station】, next stop 【Guangzhou International Exchange Bureau】(transfer)
2022-11-01 07:07 Guangzhou, 【Guangzhou International Exchange Station】Return
2022-11-01 07:03 Guangzhou City, handed over to the carrier for transportation
2022-10-23 15:03 Guangzhou City, [Guangzhou International Exchange Bureau] has been exported directly
2022-10-23 15:01 Guangzhou, export customs/release
2022-10-20 15:58 Guangzhou City, sent to export customs
2022-07-27 13:49 Guangzhou, customs clearance, Guangzhou, customs clearance
2022-07-25 14:54 Guangzhou City, sent to the import customs
2022-07-24 21:45 Guangzhou City, arrive at [Guangzhou Jianggao Processing Class] (transfer)
2022-07-22 22:54 Tianjin, leave [Tianjin Mail Processing Center], next stop [Guangzhou Jianggao Processing Class] (via transfer)
2022-07-22 17:38 Tianjin, arrive at [Tianjin Mail Processing Center] (transfer)
2022-07-22 11:26 Beijing, leave [Beijing Airmail Terminal Transport Workshop], next stop [Tianjin Mail Processing Center] (transfer)
2022-07-21 18:44 Beijing, arrive at [Beijing International Mail Processing Center] (transfer)
2022-07-21 08:44 Beijing, Disinfection of Mail, End of Rest
2022-07-10 09:38 Beijing, according to local epidemic prevention requirements, mails are disinfected and put aside
2022-06-30 02:55 Riga, leaving the overseas export exchange office (has not yet arrived at China Post)
2022-06-29 18:17 Riga, customs hold
2022-06-29 18:16 Customs release
2022-06-29 18:15 Send to Overseas Customs Department
2022-06-29 18:14 Riga, arrival at the foreign exchange office
2022-06-29 18:13 Riga, customs hold
2022-06-29 18:12 Customs release
2022-06-29 18:11 Send to Overseas Customs Department
2022-06-29 18:10 Riga, arrival at the foreign exchange office
2022-06-29 13:16 【LV】Received

Latvia Post, Synchronization time: 2023-03-08 13:17:56 (GMT+02:00)
2022-10-24 05:05 CHINA, Item sent abroad (EDI-received)
2022-10-23 15:03 CHINA, Stop item import
2022-07-25 14:54 CHINA, Shipment information sent to custom
2022-07-25 14:53 CHINA, Item received at sorting center
2022-07-10 09:34 CHINA, Item received at office of exchange
2022-07-10 09:34 CHINA, Shipment information sent to custom
2022-06-30 02:55 LATVIA,RIGA (PARCELS/pakas), Item sent abroad
2022-06-29 18:17 LATVIA,RIGA (PARCELS/pakas), Hold item at office of exchange
2022-06-29 18:16 LATVIA,RIGA (PARCELS/pakas), Return item from custom
2022-06-29 18:15 LATVIA,RIGA (PARCELS/pakas), Item sent to custom
2022-06-29 18:14 LATVIA,RIGA (PARCELS/pakas), Item received at office of exchange
2022-06-29 18:13 LATVIA,RIGA (PARCELS/pakas), Hold item at office of exchange
2022-06-29 18:12 LATVIA,RIGA (PARCELS/pakas), Return item from custom
2022-06-29 18:11 LATVIA,RIGA (PARCELS/pakas), Item sent to custom
2022-06-29 18:10 LATVIA,RIGA (PARCELS/pakas), Item received at office of exchange
2022-06-29 13:46 LATVIA, Ogre 1 Post office, Item sent to next processing place
2022-06-29 13:16 LATVIA, Ogre 1 Post office, Item posted / received from customer
2022-06-29 01:32 Mans Pasts 2 datu imports, Item received from customer (XML)