Upgrade - Wrong Information

I received a call from MTN consultant offering me an upgrade of minutes and data around July 2021 . I asked if there is any extra money I will need to pay. He said no nothing is going to change only data and minutes. On the first of Oct they debited R4145 when I call customer care they told me that migration fee was included. I explain to them that the consultant never mentioned the migration fee. I opened a case with reference number *** after some few days they closed it. I phoned again I had to repeat my story with the new consultant and the other one was opened Ref *** it was on the 5th October 2021. On the 15th Ref *** the lady told me go to go MTN shop they will be able to help me there. I travelled to Potch MTN shop in Mooirivier Mall they said they won't be able to help me because I did the upgrade on line. On the 18th I traveled to Klerksdorp MTN shop Ref *** they said the same story they even sent an email to Monde Team. I tried to call them while I am still there they said their off line I must try later . Yesterday 01 Nov 2021 I went to Rustenburg Waterfall Mall they told me that they can't help me because I didn't do the upgrade with them. So I want to know who must help me with this matter. I am so frustrated, because MTN doesn't care about their clients. I can't just be ********** R3, 551 and keep quite. Why do you allow people to call us and when we have quiries you don't want to help us. You are busy wasting my time and my children money.