Find ANY other ISP rather than using Accelerit Technologies

Advised Accelerit on 26 January that, because of frequency of connectivity interruptions and poor feedback, I am cancelling my 'month-to-month no contract' subscription and that I would not be paying for further connectivity beyond January. I have no debit order in place yet Accelerit manage to put through two ********** transactions against my credit card. Despite some 5 emails since 26 January, I have not received any response from Accelerit.