Dawn Wing Courier, not delivering but claims to delivered.

Dawn wing couriers claimed to delivered an item from Takelot to me. I did not receive nor singed for it. The tracking shows that it was delivered and signed for by a "David"on 25 August 2023. I have sent emails requesting an explanation. They did not even responded. When asking takelot, they claim it is with courier and I must wait it will be delivered. Courier is just ignoring me....no response on any emails