worst service provider

I was called by a consultant and offered a data deal and i accepted. When I started using the data i found out that it was not what I had agreed to and I called to enquire. the contract couldn't be cancelled because it was past 7 days so an investigation was logged. The Investigation was done and they found out that the consultant was at fault. I then requested it to be cancelled and was promised that it will be done in a few weeks. i followed up with emails and the only response i got is "cancellation is still in progress" . its now 6 months later and i am still being debited.