No service delivery

I have been waiting for package to be delivered since December 2021. The correct waybill was given with the wrong package, and now nobody can help me to find the correct package. They have even changed the waybill number to resend, and according to the waybill history has been delivered and completed, and yet, I have not received anything!!! The courier company cannot give me any answers, they keep transferring from person to person, but no results.