Optimum review: Internet account

I had optimum service at a vacation home. I put it up for sale a few months ago and canceled my service. They agreed to cancel it, but kept billing me! When I complained, they told me the only way to stop the billing was to go in person to one of their stores. There is no store anywhere near me. So instead, I canceled the card they kept charging. I just got a bill in the mail from them, and there is absolutely no way to talk to a human being. The only option is pay!