Xfinity store not accepting my equipment return

I called xfinity customer service to cancel my internet service on July 24th Wednesday with last day of service as 26th Friday and said everything is fine and have cancelled it. They said I can return the equipment at a store on Saturday the 27th. I went to the store on Saturday and they say it still says active and can't accept my return. It also shows a pending order which the new tenants moving in had made. The store representative said I need to call the customer service and fix the issue. I tried calling them on the same day and got a call back on Sunday. The customer service cancelled it again as of Friday 26th and provided a reference number. They also cancelled my autopay and said a final bill will reflect within 2 days which was a lesser amount than the original bill.. On Tuesday I looked at my account and it shows the original bill instead of the final bill. I called them again to make sure my account was cancelled and they said disconnection order is in system and the new bill will reflect within couple of days. They said there is no way the xfinity store could not accept my return and said they are supposed to accept it even if a disconnection order is not placed. I am now waiting for the final bill to make the payment and return the equipment. I don't want to go again and come back with the equipment.