MTN is a circus

So I upgraded my MTN contract in October '18. The upgrade I did on the 19th of October and opted for a router instead of cellphone this time. The contract I took was MyChoice 10Gig, and that included 15G anytime and 20G night. In October everything went well and I got 15G + 20G +20G once off +14G entertainment which amounted to 69G. The in November when I'm supposed to get 15+20G I get 10+10G, I called their call center on the 22nd of November and I was assisted by Mbali Zuke and she asked for my copy of the contract I sent it and no feedback till today. On the 28th I called MTN again to find out why I haven't received any feedback and I was asked the same questions but this time the agent said she will sent Mbali and email asking her to give me feedback, dololo till today. I then decided to contact the person who helped me with the contract thinking he will be able to assist as I specifically explained to him what happened with my previous upgrade( but it was fixed) the number on the contract doesn't exist or its incorrect. So I left work early to go to the store and I was assisted be Gontse from MTN in maponya mall and he said their query system shuts down at 5pm and Charlie wasn't at work. Gontse took my details and promised to give them to Charlie this all happened on the 28th November. He said he will give the information to Charlie as he himself will not be at work the next day. So Wednesday comes and no SMS that is supposed to give me the reference to show that the query was logged. And I decided maybe he forgot and on the 30th I decided to find the right number for the store and called and spoke to Charlie and he said that he will talk to Gontse and get back to me, same thing nothing happened. On Saturday 1at December I called Charlie again and he said Gontse misplaced my contract so I should send it to him again and on Monday he will log the query as people fixing contractual issues don't work on weekends, sharp. It's Wednesday today and still no feedback from everyone that is supposed to help me and I must pay for something that was not the agreement between me and the service provider. I'm really disappointed by the incompetence of everyone that has been involved in not bothering help me with my query and I will not be paying untill this is resolved.