Nedbank student load consultants are very rude

I've had a student loan with Nedbank for just over 5 years now, last year we changed the debit order account details and the person who took over the loan missed a few payments. I acknowledged this and asked for a way forward which I thought was resolved. Today I got a phone call from someone (Samashan Subramoney) from Nedbank who was extremely rude (I don't care what the situation is, I am still a client and deserve to be spoken to with respect) When I asked to deal with the person I initially have been dealing with this Samashan Subramoney person told me off. I finally got an email from the person I have been dealing with (Gwen Mashaba) and instead of trying to understand the situation, she sent a threatening email. and when I tried talking to her about it, no apology was issued. I honestly do NOT care if I owe millions to Nedbank, no one has the right to speak to clients the way these 2 people have. The fact that 2 people from Nedbank has shown me this means this is how the bank deals with clients, it's a bad reflection and I will NOT take it. I request to deal with someone else regarding my matter and not those 2 people. Thanks