Missing return, no accountability poor customer service

I returned my Temu orders and both parcels were successfully delivered back to their warehouse. On arrival, items were missing or mixed up due to clear mishandling on their side. Despite proof of delivery, Temu is refusing to refund me and is not conducting a proper investigation. If they actually reviewed the returns properly, they would see the parcels were received but incorrectly processed and mixed up. I have two separate Temu accounts, which is making this worse as I’m forced to go back and forth between Temu and the courier just to get basic answers. Relevant tickets: PO-***, PO-*** This is unacceptable service and a complete lack of accountability. If this is not resolved, I will escalate to the ombudsman and consumer protection authorities.