Lost/ ****** Items - ITT Courier Warehouse in disarray

I placed an order on Shein on the 15th November 2024. The courier company that was supposed to deliver my package was ITT courier (Graaff Reinet Branch). My order was out for delivery on the 26 November 2024, however on that day I had not received any call from the guys delivering nor did I receive my parcel. On the same day, at night I received an email informing me that my parcel is returned to the warehouse in Graaff Reinet. I then started calling the warehouse regularly hoping that I would receive my parcel shortly after that day. On one occassion, I spoke to a lady with the name Linda and on the other occassion I spoke to Amandia who confirmed that on their system my parcel is with them but they couldn't locate it. Its been a back and forth with them since that time. On the 13 January 2025, I reported this again and I was told ITT Courier is still investigating. on the 16 January 2025 they (ITT Courier) changed the status to show that my parcel is delivered, whereas that is not true. To date, I still have not received my parcel, but ITT Courier insist I received it. ITT Courier cannot tell me who signed for my parcel or where they dropped it. I need assistance with this, either I get a refund or my parcel delivered.