am writing to express my frustration with the customer service I have experienced regarding a package that was delivered on May 20

am writing to express my frustration with the customer service I have experienced regarding a package that was delivered on May 20. Since that date, I have been trying to arrange for the package to be picked up from the warehouse, but I have not received any resolution. I have contacted Shein multiple times since June, and each time I am told that the package is under inspection by the warehouse. Now, I am being asked to contact UPS to investigate the delivery issue and to make sure that all the information is accurate , which I find it unacceptable. But i did contact ups and they confirm the delivery of the package with the place and shien’s staff member receptionist name. But shien still investigating.After all that no refund was issued or even offered. I know that the package is lost but they never admitted it.