No Refund from AliExpress After 15 Days Package Held by Customs

I purchased an item on AliExpress and have been trying for over 15 days to get a refund. The parcel is held by South African customs due to excessive fees. I contacted customs, who confirmed that the seller must arrange a return, however they wont respond to calls,emails (SPEEDAF) The seller refuses, and AliExpress gives me automated replies with no solution. My purchase protection expired, and the dispute hasn’t been updated since. The order is stuck, I can’t receive it, and I can’t get my money back. This is unfair and exhausting I demand a proper refund for non-delivery of goods.