Arrogant and Greedy Bank

Previous query not resolved. Make me understand this. I am on Debt Review - all of a sudden my interest has increased. My statements show the following on wat the interest was - 25/11 - R1418.02 on 25/12 - R1362.04 and in Feb this year it is R1875.02...AND THERE WAS NO PAYMENT MISSED...It is so nauseating that this is treated with such arrogance. WHY HAS MY INTEREST INCREASED SO MUCH?