MTN - Promo data not loaded, they don't care.

I signed up for a data promo deal that the brochure said included 10GB anytime and 10GB night time. When a full new month arrived, I only received 5GB for two months in a row now. On April 21 2018, I went back to the store and the sales person logged a request. I heard nothing from anyone, the email address on the paperwork doesn't exist and no one answered the phone number either.

On 5 or 6 May 2018, I went back to the store because I still hadn't heard anything. The sales person logged a new request. After no positive feedback, on 11 May 2018 I eventually asked the sales person to escalate the issue. I received an sms with the reference number on 14 May 2018.

It is now 17 May, almost time for my next renewal and this issue is not sorted. I have called the call center multiple times because on 15 May I received two smses to say it was resolved, BUT IT STILL ISN'T.

I have called the call center multiple times. I was first told that I need to go to the store so that they can load the promo data. The store said the case is still open so they can't do anything. Then I called the call center again and was told that the case is still open and has been escalated to some other department (or something like that). Today I called again, only to e told that it was resolved on 15th May and that I must go back into the store because their record says I'm only on a 5GB package. When I told the sales person said that they spoke to the manager yesterday and they won't be able to load the data, but they are not working today and will try have a look tomorrow.

When am I going to get the data I am paying for and why do I have to fight so hard?? Am I going to have to fight like this every month?? Or do I need to cancel the contract (with no cancellation fees as this is not my fault) and go to another network instead of using the same network I have been on since 2004?