Xfinity wont cancel my service

I have moved to a different location and all they had to do was to change the service address. After spending 3 hours (not exaggerating) with them on the phone, the operator said they had to create a new account for my new address and cancel the previous account tied to the old address. I got an e-mail saying they received my cancelation request November 20th. Ever since I have been charged by Xfinity at both addresses, and have called multiple times (accumulating several cancelation request e-mails). And, much to our surprise, NOTHING, they did not cancel my account. I have been receiving text messages from debt collectors. I WOULD NOT RECCOMMEND XFINITY TO MY WORST ENEMY.