Still cant get the right contract price since May

This is my second time reporting this on Hello Peter. On May 18 I signed for a 100 anytime minutes with 300 megs data and 200 sms's. I have informed them on numerous times that I am been billed R380 and given 200 rand airtime even though 808 says I am on the right contract. I now have had either the store or 808 send roughly 5 requests to billing department to have this changed and they still have not changed my contract that I signed over two months ago. I cannot handle it anymore. I am sick of the pathetic service MTN has given me. To make matters worse, the other day I was informed via hello peter that I had a credit due to me. If this was true, why is my account the same and why has billing department not changed my contract. I am sick of the ******** I am been told and the blatant lies.