Delay by months in cancellation process

I have been chasing this matter from last 4 months through email, by visiting stores, calling the call center guys but no use of it. Still they are deducting the money via Debit order with different amount. Please please help me out to sort out this matter and return back my money.<br> And would like to inform other users that if you wana close your 8.ta contract than start the process 6 months earliest.