Poor service

During October 202p I received a call from a tarique from Gold Star Trading on behalf of mtn. He advised me of the packages available that were due for upgrades on 3 of my data packages. He went on to describe what was available, that being a 50gb anytime plus 20 Gb streaming n 10 Gb YouTube n 10 Gb music streaming. So I asked if these will be better on the black Friday specials n he said that this very promo would be the same as then but that they brought it forward because of covid and that I won't have to go into the store. I thought OK, this seems fair so I agreed to have the upgrades done for the 3 data bundles.. To Date all I have received was a mere 20 Gb package.not only was this the issue but I had asked him about a certain laptop deal that I had app**** for in July which the store here at liberty Midlands mall tried to acquire but failed to do so because of supply. I specifically gave him the product, being a Lenovo flip type laptop with a 256 Gb ssd drive which also cake with a pen for the screen. He said that they do have available and asked if I still wanted it.. Thinking that he new exactly what I wanted I said please go ahead.. Two weeks later I received a laptop from the courier service at 12h00 and I was about to leave for Johannesburg after lunch.. On opening the package I discovered that the laptop was a Lenovo but was not the one I had described n which he said he had. Since I was not able to still go to the mall to return It the same day, I did however return it to the liberty mall the Monday on muly return after that very weekend. The sales guy was pleasant and assisted me by reversing the transaction and said that once the package was returned to their warehouse it will all be sorted. Happy with this I left.. At the end of November I received my billing and the data provisions only to find that I was not receiving the agreed on package and being billed for the laptop deal that was reversed. I called 136 to lodge a complaint and they gave me some reference numbers. I was told that they will investigate nand resolve the issue.. During November n December I made several calls to mtn n one to Gold Star Trading who referred me back to mtn to solve the issue.. Same thing happened in January 2021 until I ended up in icu on th 14 January with acctite covid pneumonia. I trained in icu until 30 June 2021.After being discharged I was not able to converse because of breathing issues. However when I was able to make a conversation I called again as none of the 4 contracts had been resolved. I am still paying r500 a month for de I don't have and r299 x3 for packages that are not what I signed up for.. I spoke eto several different agents on 136 and all they ever say is they will escalate the process n never return or reply to any of my requests... A lady, a manager at Gold star trading named Melissa maxwell called towards the end of 2021 and said that she will investigate the recordings which they found and will get back to me . To date she hasn't, even after I called the company and emailed her on a few occasions. I am now almost 1 year and 4 months into this contract abuse and have no idea if it will get resolved. I cannot even ask for a senior manager to speak to to assist as they just brush a person ff saying they will escalate the process. There ***********ce in handling this simple thing is beyond me. As I have proof of return if the items which I forwarded to them and the fact that everything was recorded baffles me to say the least.