Equipment return

I am trying to return my Xfinity equipment after recently moving to New York state. There are no Xfinity stores here so I do NOT have the option of returning my equipment to a store. When I go through the returns process online, I keep getting this message to 'Please select a device' but there are no devices to select. I have spoken to several agents who have been unable to help me and keep re-directing me to UPS or the same exact return link that shows no devices. UPS has confirmed they can NOT accept a package from me without the prepaid return label. So now I am stuck. How am I supposed to return my equipment in this situation? It is a scam to try and charge me late return fees if you cannot help me.