I'm expecting package RV350500210CN. Long it will take to deliver it to Poland?

Hello!
I sent a package (CP291985461PL) to Peacock Watch, which was not delivered and is stuck in the Post Office.
Please explain what is required for delivery or return to me in Poland.
My details:
Jakub Galczak
ul. F. Chopina 13, 88-200 Radziejów
Poland

Good day.
I am writing to you because I need help in identifying the supplier of a parcel that has not reached me.
A parcel was sent to Poland via China Post on 21/08/2024. the shipment number is:
Number: AM504421413CN
Package status: Delivered (22 Days) Country: China -> Poland
2024-09-12 09:22 Delivered【Polanica-Zdrój】,已妥投
Unfortunately, the parcel did not reach me at my address Polanica-Zdrój postal code 57-320, al. Zwycięzców 6F/21.
I see that the post tracking records that the parcel has been delivered.
I checked Poland Post, Dhl, and other providers for tracking but I cannot find this parcel anywhere.
I kindly ask for help and information who is the supplier in Poland - what company and to whom the parcel was handed over for delivery to me. In this way I will be able to contact the Polish parcel delivery operator and maybe I will be able to find it. It is a big parcel that it is surprising the parcel disappeared.
I kindly ask for help in identifying the supplier.
The best regards
Renata Urbańska