MBD Attorneys payment ****

I called into MBD Attoneys to request for my balance on my MTN account and they told me it was R5098.00 on 25/10/2019 it was a friday. i then paid R1500 on the 25/10/2019 and R3600 on 28/10/2019 which amount to R5100.00. I then called few days later to ask why my account is not closed after paying the balance and the consultant told me i still owe R440, they explain to me that is the fee for my payments. they charged me R200+ for every single payment i made. according to this i can never finish paying my account cause they charge me every time for making a payment. This is true a ****, please help me report this.