MTN no service at all / Taking our money ******* / Going on for more than 2 Years

Have a contract, on the contract there is Data 3 GB which we never wanted and was never part of the package for 24 Months we had to pay the data, By the way that worked out to R411.30, Almost R10 000 for tthe 24 months. As MTN SA could not assist us. They where happy to just take our money every month. MTN Store Level as well as Head Office did not assist us in this matter at all. Evantualy it was time for renewal of contract. We upgraded to the unlimited contract, Unlimited Phonecalls & Data. We asked on Renewal day at the store, that we had a Data issue on our account they must please make sure it's not on the new contract as we have the unlimted one now and that MTN did not assist us in this matter for 24 Months. He said, no problems, the first invoice will be 100% with no issues. 1st Invoice came and guess what on top of the unlimited contract still the same 3 GB data for R411.30 (Who will in anycase pay that for data in the healty mind), went back to the store, they said, no problems, the will sort it out ASAP, next month's Inv. will by fine. Next month Came, still same issue. We went back to store for 4 more times, no assistance. EveryInv. still same. We drove 220 Km to a bigger MTN store in Bloemfontein so they can assist us. The system was off the whole day, took our details as it can be sorted in minutes according to them. Still no luck, phoned Head Office, No luck, Send Mails, No Luck. We no halfway into the new conract still not sorter. MTN Basicaly stole R16 000 from as us far. We want a Credit or solution to the *********** service they offer. To be honest we don't know what is the next step, as MTN is Useless, and We will never ever go back or renew. Only option will be to take it further to higher power. For the Record, it's the Kroonstad MTN Shop in Kroonstad.