Trying to return a phone and get refund

I can't seem to return this unopened phone they sent me after many many lies and unethical selling moves.

I see soooo many messages here, all marked closed, about not being able to return an unopened, unsolicited, lied-about phone.  And I'm seeing all the answers from Xfinity saying "Contact Us."  Hah.  More lies ahead.  After about ten phone calls they think one more will make a difference?  They are charging me almost $30 every month, it is now a couple hundred dollars.

The latest is "go to Fedex and ask for an Unsolicited Return Label."  The Fedex people had no idea what this is.  Went to two different Fedex stores.

A phone guy did say that the return address is the Xfinity Mobile Warehouse, [edited for privacy]

I'm just going to mail it back with big fat writing on the box and a big fat note inside the box.  Man, they don't even give out RMA's.  I assume they use the phone serial number.  I fully expect it to be lost in the shuffle so I'll get a receipt of some kind.

Has anybody succeeded at this travesty?