Xfinity Mobile Order Issue

I’m having an issue with my Xfinity Mobile order.  I ordered a new phone over a month ago but it got damaged in shipping before I received it.  It was sent back by FedEx and the return tracking shows it was delivered over two weeks ago.  However,  the return order still shows as processing, the phone still shows up on my account and I haven’t received a refund yet.  I’ve called multiple times over the past few weeks and am being told that the warehouse hasn’t received the phone return even though FedEx shows it being delivered.  Any help on this matter is appreciated.