Data services charged 6 months after cancellation

Autopage did not reply to previous complaint. The person phoned me and said that they will investigate and phone me back but they never did! Autopage has charged me a total of R315 incl vat for services that I cancelled before September last year. The total should be more but I only have proof of that date. By that time in my last request I told them that that was the third time that I've contacted them with regard to the data services charged even after I cancelled it. I had a problem the other day that I could not use the data services on my phone even though there was enough data on the phone and I had to phone Autopage 22 time in which they told me that they will transfer me to the technical department only to cut me off just after. For those 22 calls Autopage charged me R124.14. Please see to it that a credit for R315+R124.14=R439.14 is put through on my account. I've paid the balance of R337.40 but refuse to pay any more on this account until the matter is resolved and the credit is put through. All the requests is closed with reply that the matter is referred to the accounts department but then the accounts department suspended my account!!!!!