Xfinity mobile issue

In February I talked into trying a Xfinity mobile phone. It had no service at my home and I attempted to return it to the Martinsburg WV store. Was told there I would need to call customer service and they would issue a call tag for the return. Unbelievably I repeated this process 3 times, all well within the 14 day return window. Over the last 8 months I have at least monthly called Xfinity seeking a call tag and was told the return label would be emailed to me. It’s never been sent ( yes I’ve checked my spam box).  this month I was informed since it is outside the 14 day return window it is outside their “process” to return. Any thoughts on getting this unused, except for unsuccessful test calls, back to Xfinity mobile phone?