Contract Cancelled and Debit Order still gets deducted

Yello Data is the worst I have ever experienced. I cancelled my contracts I have with them in April, since then the debit order keeps going off. I phone every month and they say they will escalate it. August they wanted my bank statements so that they can pay the money back, which they still haven't done. Last month when I phone in to the call centre I was told that the problem had been resolved and that it won't happen again, the technical team had found the problem, and what happens this month they put the Debit order through again. I called the call centre yet again and all he kept telling me is he will escalate it and it will take 7 to 10 days meanwhile it has taken them 7 months already. The service is pathetic.

The reason I cancelled the policy was because I was paying for the service and not being able to use the data anyway so it was a total waste of money from the start.

USELESS, USELESS, USELESS