Very very dissapointing service by MTN Mall of the South

December 2018 I went to Mall of the South, MTN branch to upgrade my phone contract. I had the December booklet with me, and I requested the consultant "Simphiwe" to explain the packages to me. The package that I wanted was offering unlimited calls, unlimited smses, 5G data + extra 2G data Booster. I asked him if that means I will be getting 7G data per month, and he said yes. I signed the contract with the understanding that I will be getting all that the package is promising, that was also confirmed by the consultant. In December I got the 30G free data, and couldn't see exactly how much data I got as part of the package. January 2018, I then realised that I only get 5G and not 7G as promised, come February 2018 same thing happened. I visited the MTN branch at the Mall of the South to complain, the consultant who helped me checked on the system and even checked the December booklet and confirmed that the package stated 5G + 2G Booster. He then said "Simphiwe" did not explain this properly to me cause this is actually 3G+2G Booster= 5G. But my argument was that the consultant misled me into signing a contract under the pretence that I will be getting the 7G. Unfortunately "Simphiwe" moved to another branch. The consultant promised to assist with the matter (since February 2018). I asked him to review my contract and give me an opportunity to chose another contract where the package is clear and TRUE. Until today, I am still waiting, no one is calling me, when I go to the branch, i'm told the manager is never in the branch, they will get back to me, which they never do. I am very disappointed with the MTN service and want this matter to be resolved as I cannot continue to pay for something I did not sign up for.