MISINFORMED and MISLEAD

I am not happy with the customer service that I have received at MTN Killarney, I went to the store in May 23rd or 24th to enquire about my monthly bill and needed clarity & breakdown of what I was paying for as my bill was over R1000 which seemed high. The explanation given was not clear, then I enquired about changing my package for less minutes to more data, not knowing that would be the start of my nightmare. The lady who was helping me is PULENG and mind you she is the store manager. She changed my packaged so I can get more data, end of May when the statement comes it shows that I have a bill of over R8000 that I need to pay. As shocked as I was I called in the store and spoke to the same lady who was helping me, then she tells me about a migration fee which this was never mentioned to me when I was in the store that there is a fee for changing or upgrading the PACKAGE. Then she said it will be charged on the monthly payment that they debit which will mean my installment will go a bit higher. Long story short, MTN has messed up my LIFE and my CREDIT SCORE/RECORD 🥺😢😭😭😭 because now it shows I'm in arreas with 2 payments for July & August due to this migration fee that I was not told about in the beginning. When I called MTN after seeing my credit record, it was brought to my attention that my monthly payment is not including the migration fee 😑 I am disputing this fee as I have been MISINFORMED and MISLEAD by the store manager and hold her accountable and liable for this, coz honestly one cannot be working for 10years and not know that there is a migration fee and not inform the customer about it. Even though you might not know the amount required but surely they knew there is a fee. This is ***** and it has tinted my CREDIT RECORD, my life will now be on hold because of this because I'm in a process of application for bond and this has really affected me and my credit score/record badly, thanks to the poor service I received 😭😭😭😭😭 I am saddened and heart broken as I have NEVER missed a payment on any of my accounts and now this happens when I'm trying to get a home for my kids.... I need this fee removed from my account and my CREDIT RECORD cleared!!!