Issues returning my phone

Oh my goodness I can’t even explain a four week wild goose chase. I have spent so many hours on the phone and chat. Still nothing and I don’t want the phone. I ended up not getting discount for phone and cant afford it. I tried going to the Xfinity store, as told by one agent, and they said they don’t take phone returns and said I have to mail it in.  Now Xfinity says I am past the return period even though I contacted them first 3 days after getting the phone.  I have been told several times that I will get a return label in 24 hours via email but nothing. I have a lot of patience but this has really made me mad.