Unlimited minutes and data promo not being loaded

I've been an MTN customer for many years and I've received bad service before but this is just the worst.

My upgrade was done on 14 September 2017. I was supposed to get unlimited mtn to mtn calls for 3 months, and 10gb data for 3 months. The upgrade was done for my contract and my brother's contract by the same consultant, Ilyaas Alexander, at MTN Parow Centre. On my contract, the unlimited minutes still hasn't been activated. I've spoken several times to consultants at Somerset Mall MTN and I was just advised that the matter has been been escalated. I've also received sms's saying the matter is resolved, but it's not. In addition to this, the sales consultant failed to mention that there was a better contract, which had more inclusive minutes, for the same phone at the same price. I only found this out a month later and was told it's too late to change it. On my brother's contract, the unlimited minutes and the 30gb promotion was not activated. This is the worst service I ever received from MTN. How long does it take to sort out a query and why should I be one going into the stores everytime only to find there's been no changes? I would like for both our contracts to be sorted out as a matter of urgency, as well as have my contract changed from MyChoice to a Talk package. I don't care if I'm past the 7 day window - this should have been offered in the first place and it's not my fault if your staff is not well informed.