Package CH212966431US Stuck In Nanning for 99 Days Can someone, anyone assist me with help on who to contact

Why is my package with tracking number CH212966431US still sitting in Shanghai for over 2 months since October 3, 2024 when it is supposed to be returned to me?

2024-10-03 01:08 SHANGHAI, Processed through Facility -> Your item was processed through a facility in SHANGHAI, CHINA on October 3, 2024 at 1:08 am. The item is currently in transit to the destination

My Package Held is being held in Nanning China Customs since 6/8/2024 Tracking CH212966431US

Can someone please help me with a # to call to talk with someone about getting this package sent back to me or delivered back to the merchant??