Cancelling of contract

My contract with Cell C ended in August. In July I went to the stellenbosch branch to cancel they refused me to use their phones. When I returned in august I could use the guy’s phone and was then told I cannot cancel because my account was in arrears. Bear in mind cell c never deducted money from my account or even tried to because there was money in. I paid this amount in September because I was told to eft and send a proof of payment of which I did because I want to cancel my contract. To this day cell c never allocated the payment and I was told yesterday again to wait a 3-7 working days to allocate the payment but I sent a proof of payment a month ago! When I call cell c I am offered new packages instead of what I really want. I don’t use the cell c sim because when I put the sim in it says no service. How many times do I have to go there to cancel and call but nothing happens. I’m in this predicament because I was refused to use the phones in the cell c branch in July! Now my account shows arrears because cell c cannot allocate a payment I used a reference provided by them for and sent the proof of payment provided by them too! In the mean time I must just give money every month to cell c for free because they can’t do their jobs

Yesterday when I called the call centre, yet again I was offered new contracts and was told a team leader will call me back and I’m still waiting. I’m still waiting for three months now! All while I’m being billed for something I can’t use! I refuse to be bul**** into a contract I don’t even use I honestly won’t to business with cell c again as their service is pathetic to say the least.