Unfairly Charged Fees

If I could rate MTN 0 stars I would.

MTN has unfairly suspended my phone SIM card because apparently, I did not pay a fee for downgrading my account.

Here is the story: Two months ago I called one of the MTN customer care agents requesting for her to cancel my data plan that came with a router and SIM Card. The agent then told me that I would have to pay a fee for the remaining months of the contract, I then told her that I was cutting costs and did not have that amount of money. Therefore, she told me that in order to not pay any fees, it is better for me to downgrade my router data plan to the minimum plan and I agreed.

Moreover, the agent then also advised me to reduce the amount of money that I was paying for my data plan on the phone SIM card that they blocked now and did not mention anything regarding downgrading fees, again I was cutting costs so I wouldn't have agreed to paying fees over R2k for downgrading a plan that I didn't need to be downgraded in the first place. I remember even asking the agent more than once how much overall amount I was going to be paying at the end of each month and she never mentioned anything about the +R2k fee.

A few weeks ago I called the MTN customer care again to ask about the unfair fees and a different agent told me that MTN needed to listen to the phone recording from the first call and that they will get back to me a soon as they hear the conversation, and I have not heard anything from them ever since.

Can MTN please cancel that suspension ASAP because at this point I can't do anything with my phone SIM card, I'm always stranded.