MTN service pathetic

I was due for an upgrade on 3 of my contracts, where I then received a call from MTN whom offered me my upgrades. I then upgraded my 3 contracts beginning September 2021 and was not able to use my tablet's data at all after the upgrade. I visited MTN store in Nigel last week Saturday 2 October 2021 since it was the first Saturday I was off duty at work but I could not be assisted - they were offline. I contacted the call center Mondo and spoke to Manny on *** who told me that my tablet was upgraded to a specific contract where I will not be able to use the data in my tablet, which I clearly stipulated to the lady whom upgraded my contract - I NEED TO USE IT IN MY TABLET AS A HOT SPOT. Now Manny told me just to go inside the MTN shop and ask for an early upgrade, which I know and he knows will call for a penalty fee! Manny told me that I would need a specific router to use this contract, so for this my husband's business has been having problems as we do not have internet access other than my phone. At this stage I will not recommend MTN to any of my relatives or friends