Unauthorised debit after contract cancelled

I have not had any dealings or a contract for that matter with Glam 5 in over a year. Today i was horrified to see that they could just debit my account without authorisation or notification. I tried to call them on the number provided on their website but the number doesn't even ring through. I then tried to send an email to the email address provided and it bounced back which i suppose should not have surprised me. Not receiving someone consent before debiting their banking account, is *****. This matter should be dealt with the utmost importance.