Disgraceful lack of service from Vodacom. VERY DISAPPOINTING

I have been trying on numerous occasions, since the beginning of April, to cancel 2 contracts. Everytime I phone Vodacom, I am told that they cannot access the 2 contracts as the contracts are on the old system to which they do not have access to, and that they would log a request for someone to phone me. I have also sent the requests through by email a few times. I eventually received a phone call at the beginning of July to say that the cancellations had been logged. I asked if that meant that I would no longer be receiving accounts for these 2 contracts and was told that I would not. I received my Invoices & Statement just recently & to my utter disgust I have been charged again for these 2 contracts. I am more than fuming over this disgraceful lack of service. I have done more than my fair share of giving them the required notice to cancel, yet they are still *****ing my hard earned money. I am desperate to get in contact with someone who can help me to sort this out. Their lack of service is as bad as, if not worse than, Telkom. Please help!!!!! I have given a 1 star rating but if it were possible it would be zero.