Extremely poor service

On 23 December 2017 I upgraded an existing contract. The package included 10 gig of data per month for 3 months as a promotion for the LTE device. Have not seen any of that data to date. The 808 call centre refers me back to the store as the store did not load the promotional data correctly. The store logs a "remedy", but that is not done correctly, either. Went to a different store, again a call was logged with the documentation from the upgrade. It would be resolved within 2 to 5 days. Well, it has been 14 days, no data. The fault was escalated to a supervisor. Again, it has been a week, and still no data. After many calls to 808 and the store where I did the upgrade, who else is there to contact? The contract I signed was for the recurring airtime, SMS's, data AND the 30 gig (3 x 10 gig per month). Not perhaps or maybe on the 30 gig. There were other contracts available that would have cost me less, with the same 30 gig LTE data. However, because I needed more airtime, SMS's and data on a monthly basis, I opted for a more expensive contract that would offer me that along with the 30 gig promotional data. That was part of the promotion and that was what I indicated to the salesperson that I wanted. If I can only get confirmation from MTN that the 30 gig was not part of the specific upgrade. That I must have misunderstood the salesperson or that I did not stipulate that as part of the contract. Just confirm this to me, so that I can stop wasting my time trying to get this resolved. If this was part of a perverse marketing campaign to attract customers and not deliver on the promise, just tell me. They even don't have to do it in writing. A phone call would suffice. They know that the average customer will may not be in a position to take them on in court. The David and Goliath scenario. But, at least that way I can move on and make sure family and friends know of this experience and that I should never again have any business with the company (although the ship has sailed on the last part).