Supersonic isp all round pathetic, force payments

Pathetic service, pathetic line speeds ( always less than 5mbps at any time in the day when I am paying for 20mbs) , even more difficult to get rid of this company when cancelling as they keep saying that somebody will "email " me which never comes. Cannot even cancel on my own as it is not a debit order which I can stop as they take it as a purchase from my account , so the only way to get them to stop taking money is for them to cancel which they keep avoiding and force me to keep paying . Do not take supersonic , absolute worst isp ever , all round pathetic you will regret it if you sign up with this isp. Even after submitting the 30 days notice that they require, they still give me the run around, and the consultants claim that customers are not allowed to speak to the cancellations department! Never encounted such a useless bunch of clowns like this before!