Discrepancy in Charges to Account

If I could rate zero stars, honestly I would. I'm not sure if this institution has a finance department, because my account has just been an absolute mess. I'm currently in my third year and boy have I been just absolutely dragged through the mud with my *** it took them 11 months to fix an over charge on their end, leading me to have to write a supplementary exam, which I then also was charged for, no apology for the delay, no apology for the extra charge, and no apology for me having to even waste my time and re-study for an exam I should have never had to write. To top it off, just last week on 14 February 2023,my account was on a zero balance, today, 20 February 2023, I now owe R512, someone decided to change the price of one of my subjects again after full payment, same issue as last year. And of course there doesn't seem to be a manager in charge of the distance learning department in johannesburg, I'm not sure why, trust me I went through the trouble of trying to escalate my issue last year, which led to a dead end, there was a head of distance learning in Cape Town, but he could not assist me, because he doesn't deal with Johannesburg. Rather disappointed to have to fork out such a large amount of money and then still have more charges added.