Failed cancellation. Failed feedback

I cancelled by service in September. I asked to move the cancelation out by a month. Which they agreed to. Thus, service should have been cancelled end November. They took money for December. I have emailed about 12 times for someone to assist, and they only feedback I get is a updated ticket number. I have phoned about 20 times, and either after 15 minutes I have up. Or they transfer me and the call get cut. Or someone is going to call me back. I have never had such shocking service. I am glad I did not get me new line from them again. I would never recommend them.