Terrible service - lost my items and not refunding me

I sold an item on YAGA. The purchaser wanted to bundle items. I put two parcels in the locker. The Pudo team/Courier guy missed the second package and only delivered the one package to the purchaser. This sale happened on the 5th of April. A month later and they are still not providing answers or solutions. YAGA doesn't take any responsibility whatsoever and just said Pudo needs to refund me... But Pudo doesnt get back to me. Terrible service.