Shocking Nedbank Service

I took a personal loan in November 2018 and I've had nothing but grief. First of all, the first debit order went off on a completely different date, than what I had requested. Secondly, they have listed me as a slow payer, yet my account is completely up to date. The only debit order that I know of that did not go of was on the 28th of February 2019, but it went off on the 1st of March 2019. I am so frustrated right now because I am trying to buy a vehicle and when I check my credit report, it says the one month I'm okay, and then the next I'm in arrears. I am really frustrated with Nedbank, I honestly would not recommend anyone to take a loan there if this is the kind of stress they will have to go through. You get to the bank and the first thing they do is send you to a phone. Why can't I get someone in the bank to assist me? I get to that phone, then I have to wait 30 minutes just for someone to pick up and they can't assist me.