Absa the worse bank to ever bank with.

Took a personal loan from Absa. I went for a major operation beginning of the year. So I had to wait to go on Temporary Disability however Absa failed to understand that and so my account was in arears. I paid the amount which was in arears and also paid my monthly installment every month. However Absa kept debiting extra every month and some months taking my whole temporary disability payment. I phoned an queried as to why they kept taking out so much money I was told that they do this to drop my monthly installment. I said no that's not right you need to inform me about it.(this was in May)... So anyway they had refunded me the extra they have taken and only took my installment for the month... So now end of July I get a call saying my account is in arears again and I said but how come because I can pull out my statement and show you that I made payment every month. The lady says sorry mam but in May when we Absa refunded you we refunded extra by mistake and that is why your account shows this because of the amount which we refunded to you. I told the lady so now I must pay for the mistake Absa made in May?? She says yes and was so rude kept saying I must pay and why am I being difficult so I said I want to speak to someone higher from July till today 15/08/19 I'm still waiting for this lady to call me back and I keep receiving messages to pay this amount. I spoke to the manager of Absa and told him that this is not my fault this happened in May and now in July you tell me I am in arears but for the mistake that was made by Absa?? He says sorry I will investigate and get back to you tomorrow but if it is true that I was refunded extra I must pay it back. I told him where is the proof I want proof because I don't know if you guys are lying to me or not... So I will await his call tomorrow....