MTN - Cant complain about the service because there isn't any !!!

Good day, I been trying for more than over a month now to upgrade my data contract, *** to a contract with voice minutes, Xolani at the Clearwater Mall branch in Roodepoort has messed up the entire contract, he suggested that I add minutes to my existing data contract, after numerous request and frustration 500 minutes was loaded onto the data contract. I kept on letting him know, there is no minutes and still couldn't make any calls. He kept on telling me that it's loaded it must just go through on the Network. As a Sales Consultant I was placed under a lot of stress as this is affecting my income for the month of February due to the bad service that I received, yet to continue. After numerous calls and frustration he then told me that he cannot load minutes on a data contract. This was now 3 weeks later. How did he not know that and yet it was captured?! I was also invoiced R500 for my bill for minutes which I had no access to. I then again went to the Branch and was told I needed to do an upgrade to the Sky Promotion Package for R999 per month. He then requested a migration and instead of the upgrade but again promised everything will be sorted out. A week later and nothing has happend. Again I went to the Clearwater Mall branch on Friday eve after I called and was unhappy about the service received. I was then assisted by Kholiso who I spoke to earlier on the phone as Xolani was not available, but me and my partner spoke to him on Whatsapp without any success during the day. Again today I was told that I must call cancellations to see if the contract was cancelled. After two calls, and again I was told the incorrect request was send, nothing was done from the branch's side to correct this. To my surprise Kholiso told me that she could not capture the package as the contract was not cancelled and had to be moved to pre-paid and she could not load the Sky Promotion until this was done. Again I called Kholiso, I insisted that the matter gets resolved. Kholiso said Xolani called a friend to assist and would let me know by 7 if it was done. I did not hear anyhting from anyone further. This is the worst service ever experienced by a service provider, it is totally unacceptable, Xolani did not seem to know what he was doing, yet he informed me he is the second in charge?! Not even the Manager, Mbeki assisted. The staff made NO effort to resolve this matter while I am still without the upgrade that should have been done a month ago and continue to loose income for the month. Additionally i was charged R 200 for the cancellation that no one seems to know about. Your urgent attention in getting this matter resolved is now required. Please contact Eugene on *** as I will be writing exams today. Please note, screen shots of the WhatsApp chats are available with regards to this matter. Many thanks. Melani Badenhort.