Returning Unprovisioned Modem Debacle

Trying desperately to return an unwanted, unused, unprovisioned modem for days.

Have talked to a half dozen people with a half dozen different answers and still no resolution. I was told I had to change modems a few months ago because of an unwanted, unapproved speed tier increase. The power cord to the replacement modem would not stay inserted in the back of it. If you moved it, cleaned around it or breathed on it the power cord would fall out of it and you would have to boot it back up. I put up with it as long as I could and finally had enough. About a week ago I was also experiencing the usual semi annual degraded signal that occurs twice a year like clock-work here. A whole other saga that is a story all by itself.  I told the agent on the phone about the cord issue and asked for a new cord. Nope, refused to do that, said I had to get a different modem. I pushed back but lost the battle.  They shipped a replacement. Told them black in color only. Tech comes out and offered to replace the cord while he was here which was great. New modem arrives the next day--a white one. Don't want it. Called and was told no problem, send it back. There isn't any kind of return label included. Was told to go online and print one and the agent would make sure that it wasn't  on my account which it wasn't as I had already checked.  But you can't print a label for something that isn't actually on your account because IT ISN'T ACTIVATED. Called again and was told I didn't need a return label and to just take it to any UPS store or drop off point and they would handle it. Went to 3 today and they looked me like I was nuts. 

Talked to yet another worthless agent after that who told me I had to take it to an Xfinity store, which are at minimum 45 mins from me. Called again and was told by another agent the store only takes replacements not returns. Got on online at about 8:15 last night and ended up talking to 5 or 6 different agents in chat as they wouldn't let anyone call me as I requested. Told to call 4 other phone numbers, that they were adding the modem to my account which didn't work, to use the info on my existing modem and apparently try to fake it somehow and after being disconnected from chat 6 or 7 times and trying to reconnect with someone, got

denied access to their site because the server thought I was trying to pull some kind of DOS attack. Icing on the cake. Frustrated, pissed off and completely sick of the entire episode doesn't come anywhere close to describing it. And I am still stuck with the flipping modem .