HONOR YOUR DEAL!!!! FALSE ADVERTISING!!!

At this point I'm so frustrated with MTN not honoring they deal. I have processed an upgrade on 11 May 2018. The deal was a sim only deal on a 20 Gig data contract, however it is advertised as double your data. Which means I must get 80 Gig data. To my surprise, I only received 20 Gig data on 21 May 2018 and not 80 Gig. (40 Gig anytime and 40 night time). I called to the call centre and they logged a ticket. I called back 3 days after that only to find out that the ticket was closed and feedback was that there was no credit due to me. What?! I was not disputing any credit, I was disputing data that I didnt received!! I spoke to Narish Harilal a team leader from the Durban call centre and I sent the agent and her an email with proof of my upgrade and the screen shot of the deal that was advertised in the May booklet. On Monday, I called again to speak to Narish because she didnt respond to my emails. This is very bad customer service from a team leader!! I have also sent an email to Tsoanelo Nqache with the proof but with no joy! i called again this morning to the call centre and spoke to Clint (team leader at Durban call centre) and I advised that I need to send the email again with proof to the consultant (different consultant) whose name is Sphumelelo Nozaza due to the fact the the ticket was still open and they were unable to view the attachments. All Im asking is my 80 Gig data to be allocated and not prorate for this month and my query resolved! This is very pathetic customer service from MTN. You need to honor the deal!!!!! My reference number is 1- ********** 6593