Nedbank personal loans department harrassment

I would like something to be done about this consultant named Aubrey Mogakane from the personal loans collection department. He phoned me at around 7 in the evening, very unusual times for a business like Nedbank, harassing me about the arrears on my Nedbank personal loan account. I have made Nedbank aware multiple times that I am currently unemployed and cannot afford to pay the entire arrears amount. I made a payment arrangement today and I was told that there was a system error and nothing was loaded and that I should phone back again. I didnt expect this rude consultant to phone so late in the evening and telling me that I am lying about any arrangement being made. You guys can go access your call recordings around 16:30 and then contact me again with an apology!