Trying to cancel my 8ta contract with no luck

On the 1st of November I cancelled my 8ta contract in store (that actually expired in August) case number ***9. I was told that someone will call me to authorize the cancellation 2-3 days later. No one has phoned. I phoned numerous of times and every time I phoned there is a different story. Then after speaking to a manager he said it takes about 20 working days so we waited the 20 days out. Then my debit order went off. We phoned again and I was told that they will refund my money within 72 hours. It is now the 7th of December and my contract is still active and the call center says nothing is reflecting on my account that I cancelled I have to wait for the cancellations department to phone me. Can someone please call me to cancel my contract. It is amazing that it takes 1 hour to get a new contract but 37 + days to cancel it.