MTN billable fictitious amounts

I engaged with MTN for products which were incorrectly delivered in May this year. Even after returning the products to the store and obtaining and completing the correct paperwork, MTN continued to bill me varied amounts for said services used, even though I did not have the equipment activated or in my possession. Not only was I billed for services I did not use, but of interest is to note how MTN created fictitious varied amounts to bill for equipment I neither had or used. I have been billed the below amounts: - 01/07 -R1 123.4002/08 - R1 257.7501/09 - R1 651.80 The only refund I have received is R1275.75. I then also received a new invoice for R140 this month, even after the agent advised that my contract had been cancelled. I have spent literally over 100 hours on emails, calls (using my CellC prepaid phone) and in store, driving to Somerset West as MTN do not have a store in Stellenbosch which deals with returns. Not only has this cost me time off from work, but this has caused me emotional stress. Also the loss of interest. I now have reported this to ICASA dealing with MTN for 5 months without resolution I believe warrants an escalation. The treating of normal citizens with disdain and disrespect by large corporations for me is the largest crime of all.