T-Mobile Says Warehouse Didn't Find Returned Phone Yet

I'm currently dealing with this issue with a phone I returned in October 2022. Tmobile has admitted that they cannot locate it but it indeed was delivered to their warehouse dock. I only found out they " cannot locate it " once I asked for it back since they took months to give me a credit. I was lied to for months and given the run around until I asked for the return of the phone that I sent in. I am shocked to see this is a common issue for many people and not just me. This warehouse needs to be investigated because clearly someone is not doing their job honestly  with phones and packages. Tmobile told me " sorry" and expect me to pay for this phone that I already sent back in months ago. I will be proceeding with whatever next steps I have to get my money back but first I will disconnect my entire account with them. They lose more by losing an account than a $1300 phone.