Irate parent

I would like to lodge a complaint because it seems like SPARK is running a ***** accounts department. I understand I've been late for payments and have made payment arrangements monthly to catch up. I spoke to Vusi Makhubo to advise of the payment arrangement. I'm shocked to see the statement is now inflated R13 000 as if i'm not making any monthly payment I was late with only R4000 & that's the amount I know very well I was behind with. I don't understand How can R130 of interest make my arears to come up to R13 000 in just 4 months??? when I'm only suppose to be owing R 6000 to the school. SPARK is a ***** school and I hope no parent enrolls their child in that school they did the same thing 2023 I had to get my children out of the school because they inflated the school fees to R30 000 because of the problem of government schools always being full I had no choice but to put them back to this **** of a school. They inflate amounts like it's going out of fashion and when you ask for their superiors they block you so you don't speak to management