iPad scam

I was promised a free iPad at the end of December close to Christmas. I was away for a couple weeks when I came home in January. I had the iPad and I realize that my bill has gone up dramatically. I called immediately as soon as I realized. They promised me that they would make an exception and return iPad. But every time they had to print a label it was an issue. For some reason they couldn’t print a label to return the iPad. I have continued to call every week since January it is not March I even mailed the iPad back on my own from an Xfinity store in Massachusetts. And Xfinity said they would maio the iPad back again. I still have not received iPad and I’m getting charged for it.  I do not want this iPad. I’ve been trying to return it since January. The first associate I talked to told me that he was going to make A one time exception and never followed through, and I have been completely screwed ever since. It has been nailed back. I gave them proof that it was mailed back. I gave them a confirmation number, I told him I did it through the Xfinity store. And it’s always a different excuse as to when, and why I am returning to iPad. I was completely scammed by an associate they tried fixing it and did not follow through. I refuse to pay anything for this iPad since Xfinity  currently has it. I do not want it mailed back. I do not want the iPad and I wanna get completely refunded for any charges that have occurred. Every time I call, I asked the people where they’re located if I can go down and they say they are not even in the United States, so Xfinity must use third-party out of the country people to help which is not very helpful. I need help immediately. I need this resolved immediately. I have been calling every week since January this is simply not good customer service at all.