RUDE AGENTS AT AFRICAN BANK

I am currently being harassed daily by African Bank collections call center staff. I have had such a great experience up until the last 2 weeks. I am getting called by very rude agents that are demading that I will pay an extra R200 over above the original installment that was agreed too. I asked for a statement and discovered that there is an extra amount of R2500 that has been added onto the already 100% of the loan that I am paying back, from what I understand we have a law in SA, "Induplum" that clearly states that we cannot pay back more than 100% of the that we took. So I am being harassed to pay an extra R200 over my original installment to compensate for R2500 that has been added to the account. I was unemployed for a year, however when I was employed again I put an arrangement into place, and I got a statement monthly and I did my calculations and everything added up to the 100% payback and some change extra. So how did it happen that an extra R2500 is added to the outstanding amount and how is it new rude and uneducated staff are calling me to demand that I increase the installment for the extra amount that is now there? I say uneducated because every collection agent that called me couldn't tell me what the law "Induplum" is, instead two of them told me they didn't call to talk about the law they called to tell me that I am going to increase my installment, so I better call customer service if I have a problem with the balance but I am going to pay the extra R200. So I did just that I called customer service and after the 4 th person told me that they cant help because my phone number isn't updated on the system (however the phone number appeared to be right every morning at 7:30 when they call) and that I must go to the branch to update my cell number and then I must call the call center back and they will send an email to another department that will review after 2 days and get back, while in the meantime I will keep getting harassed daily at 07:30 (isn't there a law against calls before 08:00 in the morning?) So today was the last straw after I was called by a very rude girl from the Call Centre in Midrand by the name of Tumelo Ma*****e, she was very condescending and rude to say the least, when I told her that I am not happy with the current balance she very rudely said" What is your balance, tell me what your balance is" i didnt lose my cool and I while I was pulling up my statement I asked her to check on her side and she eventually confirmed, I asked to speak with her supervisor, Kajal Maharaj, she would push that request away and said I need to speak to someone in customer service and I explained that they cant help me and then she said she won't transfer me to the supervisor because the supervisor is not there, she will email the supervisor to call me back. How on earth can a company like African Bank employ staff like this??? I can understand if it was one staff member but I encountered this attitude from a few of the agents, I previously never had an issue but now its like a new call center has taken over with kids with grade 6 to make calls and demand money from paying customers to pay more money. How about having professional and educated call center agents calling your customers, just like the ones that call you when you are applying for a credit card or a loan, and also getting that same quick response on your query rather than say it will take 2 days for someone to get back to you?? I did call back after this ********** experience I had with Tumelo, and spoke to a pleasant Refilwe, that didn't argue with me and handed me over to her supervisor by the name of Simenyela Malindi, that listened to what my concern and sent my query to the relevant department that will get back to me in 2 days hopefully to confirm that my outstanding balance has been rectified. It was a pleasure to speak with Refilwe and Simenyela, after speaking with Tumelo, and hopefully they will be able to assist with my query.