Continue to charge me after I cancelled.

I cancelled my internet vitality broad band in June as they where not answering their phones and I went with another supplier. I asked Vitality to ensure that they had put my account back to just the email account payment and no internet. <br> <br> The debit order has gone off again and I phoned they said they had escalated the problem with accounts more than 2 weeks ago and still no one has called me. I can't get a number from them for their accounts department but this should have been sorted out weeks ago and I should not have been charged for the second month. I did not use the service as I requested it telephonically to be cancelled and what told that it was.