MBD (TotalSport) - Horrifying experience

Good day,

I'm very angry and frustrated on how my TotalSport account was handled by MBD.

In July I was sent a message giving me a discount on the money I owed for my TotalSport account. I took the offer and started paying. I was told that I should pay a certain amount in three months and It was then split into three installments. I then made the first installment, then second and these were within the agreed range. The last installment I went in to pay what I owed and I thought it will be around R900.00 because I paid extra on the first month. The consultant from the shop told me that I will not be able to close the account if I pay more than what is owed according to what he has on the screen. I was told to pay a specific amount then I left the store because I was told that I can't close the account on that day as the money takes few days to reflect on the system therefore we can't call the cancellations department. To my surprise, I received an email saying I'm owing the TotalSport account a month later. I then called in at TFG to understand what was going on and I was told to contact MBD. I did and the consultant I spoke to said she was working from home therefore couldn't transfer me to the team leader. I was told that the Team Leader will call me back. Till today I haven't heard from them. I received another sms about the outstanding amount. I called in and I asked to speak to someone senior. A lady by the name: Dineo Moeketsi told me that I should disregard titles as she will be able to help me. She then told me that I should take it up with the person who was helping me at the store and she can't do anything on her side. With such rudeness

I will not pay the amount that I'm told I owe. I was advised to pay around R150 less and this is put on me?