CANCELLATION OF CONTRACT NOT ACTIONED

We cancelled our 8ta Telkom mobile contract on 27.1.2015 when it had reached its anniversary and was then on a month to month basis. I emailed the request for cancellation on 27.1.2015 but failing to make contact with 8ta by phone we went into the Bluff, Durban store to confirm that the cancellation has been actioned and was informed that the contract had been cancelled. On 11.2.2015 I received a text message to say that (case number ***6) had been resolved. On 2.3.2015 I emailed 8ta again as we continued to receive invoices and our account being debited. It is impossible to get any response from 8ta. Their customer service is non existent and to this day we are receiving invoices. To add insult to injury the number had not been used since November as 8Ta has incredibly poor reception always and the phone was on SOS Services the majority of the time. Never use their service