I Settled my account, but you keep calling and adding new call costs.

On the 14th August I requested a settlement amount. I was quoted R2149.19 for settlement, I asked MBD to send me an email stating this, but never received the email. I called RCS and asked them what the amount on their side was. They told me to pay R652.30 to them directly and pay the other amount R 1496.89 to MBD. Yesterday, when I called MBD to ask where the email for settlement is they informed me that the account has accrued charges of R130.46 because they had to phone me. Now, the calls happened 15 minutes after I said I was going to settle and also about an hour later on the same day. I was also told that the settlement is only valid for 7 business days, yesterday was the 7th business day, but on their online portal it clearly states that it is valid for 14 days. When I called in yesterday to ask for the email and argue about the extra charges, I was told to just pay it as this is how it is. Today, after receiving a letter with the settlement amount of R1627.35, which I paid, the account has accrued charges again. This time for R173.85. I mean, I have settled the account according to their amount. Now today the account has an extra R173, 85 which I am expected to pay or stay listed on ITC. Question is, if I am stupid enough to pay this, what guarantee do I have that tomorrow there won’t be another amount? They have already called me 2x today and I called them once, so there will definitely be new charges. When is this ever going to stop? I am going to go and see an attorney about this and get the cost recovered from MBD, because what other choice do I have??? MBD, you have to refund me all the charges for the last week and honor your amount of R2149.19. I will fight you for this, its R300 rand only, but it’s my R300 that you are *****ing!