Returning incompatible Iwatch

I been trying to return an Iwatch, as it turns out in not compatible with the version of iPhone I have, from the day I got it. I have been trying for quite a while to get a return shipping label with no success.  I have tried Xfinity Assistant, Live Chat, talked to a representatives on the phone and even spoken to “supervisors”who put me on hold for a while, then came back to tell me both are trying to resolve the issue and they will email me a return sticker within a couple of days, but it never happens. Now the I watch is past the returned window, thus creating another problem on top of the first. I even been to an Xfinity store who told me they cannot receive Apple items. I don't know where else to turn, and I am tired of spending so much time on this. I been a Comcast customer for years but enough is enough as it should not be this difficult to returned an item.  It been over a month and several calls later and speaking with “ supervisors” and they still say I’m getting the returned label via email to no avail. I still have no return authorization and have not been able to solve the situation. Now they are billing me!  I also notice several other people on this forum having the exact same problem as me. I’m now seriously considering asking my son for his services as a lawyer to resolve this matter. Any last advice on where I can turn without getting legal services?