BILLING FOR EXPIRED CONTRACT AGAIN

Second time in one year were MTN has billed me for an expired contract (on 30 Sep) even after l called on numerous occassions to cancel it and was assured that it would be cancelled and transferred to a pre paid number. I received an email from Lerato Moyo from CIM Retentions confirming that she received my request on the 23rd of October even though l contacted the cancellations department twice at the begining of October, ***. I have been billed for airtime for October and November. All l want to know is what kind of a ******* account system are you running were you request clients to call to cancel a contract THAT YOU AND I BOTH KNOW HAS EXPIRED, and still get charged for airtime and data that l did not request for because I CANCELLED AND REQUESTED THE LINE TO BE PRE PAID. I have tried to be loyal to MTN, l have been using your network since 2007 but l think it is time we part ways because your service has detiriorated over the years. Please tell me how l can be rid of you and move on to a better network provider<br>