8ta *********** and trrible communictaion skills

I signed up a 24 months contract with Telkom(8ta), which I paid for the duration of the contract. I work in Kensington JHB and moved to Kensington last year. I realised that the reception was very bad, I went to the branch in EASTGATE, which one of the consultants confirmed that a lot of clients have experienced this problem, without convincing me to stay, I told I will cancel the contract, which was in September, she advised me to come in October(the month my contract was due to expire), so that I don't have to pay cancelation fees. I agreed and did as instructed. Telkom continued to debit my account and I was not even using the modem anymore, as I was under the impression that my account was cancelled. I reversed the debit orders, as I paid up my 24 months and cancelled the contract. I received a call from NUDEBT, saying my account has been handed over. I provided them with proof of cancellation/closure of account. I have been calling them for the past 3 weeks, they told me the account has been put on hold, whilst 8ta is still investigating, however they have not heard anything from 8ta. Been trying to get hold of the call centre with no luck. I REGRET EVER TAKING THAT MODEM.