pay back my R2500 you stole

April 2015. I changed my contract. After advice from consultant at Constantia branch, I waited to make the change and take new handset to AFTER the maturation date to AVOID a clawback fee. End of May i get automatically billed nearly R2500 with NO notice. On emailing your so called customer care, they were rude and told me in summary, it's my fault and i owe the money. I went back to the consultant who follwed up. On return to him having not heard anything he explains the shop is only a franchise and mtn are blaming him and he is blaming mtn etc etc....it's a bladdy joke. It's now August and I have not heard a peep. If I do not have this money returned to me by the end of this month I am going to terminate my agreement with you and terminate my debit order. I have had enough of your non-existent customer service and total disregard for our rights and the disgisting manner with which this have been handled.