it’s been since the 26th of march since i placed my order and i haven’t heard a thing about my package since the 29th of march all it says is the express shipment leaves the processing center dongguan city idk if i should be worried or not since i have guaranteed delivery within 15 days but it hasn’t even made it way to the uk the tracking number is AT352528140CN

My Item has not turned up despite the tracking showing as delivered.
What can I do and who do I contact?

2023-12-07 14:53
Birmingbam,Birmingbam,B236JU,Delivered【GB Birmingbam Birmingbam】,Delivered

2023-12-07 10:45
Birmingbam, Birmingbam, B236JU, Birmingbam Birmingbam, Birmingbam, Birmingbam, Birmingbam, Birmingbam, Birmingbam, Birmingbam, Birmingbam, Birmingbam, Birmingbam

2023-12-06 17:29
UK [In/At Mailbox], In/At Mailbox, express mail in the domestic transshipment

2023-12-05 16:20
Birmingbam, UK, destination forwarding [Birmingbam], express mail in the domestic transshipment

2023-12-04 15:20
UK Express Arrives at the Processing Center [GB Birmingbam], the shipment arrives at the Processing Center

2023-12-03 17:25
The import customs keep it for inspection, the shipment arrives at the processing center

2023-12-02 16:35
Customs clearance is in progress, and the shipment arrives at the processing center

2023-12-01 15:20
Arrive at the Airport of Destination country, Arrive at the Airport of Destination country

2023-11-30 13:15
After the Chinese customs clearance is completed, it will be sent to the transshipment country [in transit], and the express will leave the processing center

2023-11-29 15:29
China mail arrives at the processing center at the place of delivery [customs clearance], and the express arrives at the processing center

2023-11-28 17:25
Leave processing center in China, the shipment is in transit within the country

2023-11-27 15:29
Arrive at processing center in China, and the shipment is in transit within the country

2023-11-26 16:25
China has left the [Shenzhen Processing Center] has been exported and sealed, and the express has left the processing center

2023-11-25 14:29
Shenzhen arrives at [Shenzhen Processing Center], and the express arrives at the processing center

2023-11-24 10:25
Wenzhou leaves [Wenzhou Processing Center], the next stop is [Shenzhen Processing Center], Departed from post office, and the express leaves the processing center

2023-11-23 16:25
Wenzhou arrived to [Wenzhou processing center], Arrived to post office, express arrival processing center

2023-11-22 18:26
Wenzhou, China Post has received mail

AG271780469CN
USPS Awaiting Item, the shipment leaves the processing center
DALLAS TX 75220, READY
China post is don of delivery
But not delivered