FED UP CUSTOMER

Since black friday last year I have had problems with MTN, I dealt with Warda at MTN Vangate Mall. I requested for the 30GB data package for R199 p/m, that's what I signed for. Instead I got 40GB data p/m for R299. So I called the call the call centre and was told they can't do anything for me, I need to go instore. Arriving at the store I spoke to Waleed very helpful he was an absolute pleasure to deal with. Siyabulela kept me updated about my query, I got sms' from MTN informing me that the problem has been resolved but yet it hasn't. When I went in store to make payment and hopefully solve my query I was told by Malengolo that she is not in that system, I'll have to wait in line again to speak to someone about my query. Believe me I'm so fed up with dealing with mtn and the buck gets passed but nothing gets done. Warda hasn't sorted this out, why do I need to pay for something I haven't even asked for when it was her mistake. It months into the contract no apology has been conveyed. I have more than one contract with MTN and haven't had any problems before. There are more customers having the same problem. When I spoke to Shaun about my query he informed me that the package I'm paying I should be getting 50GB data p/m but I get a sms every month saying I get 40GB data p/m. Where's the rest of the 10GB data going?!