Appalling service from NedBank loans. Disgusting in fact.

I am so livid. I had a personal loan with Nedbank which I paid off on the 15th of this month. Before I settled the loan I called Nedbank personal loans to ask for a settlement letter and the process that must be followed once I had paid off the loan. The consultant adviced me to call Nedbank two days after settling the loan and request for a account closure of the loan account. And then I would be refunded what ever amount that would be due to me. I did exactly as I was told. I called Nedbank after two days. Spoke to a consultant that told me the process would take three working days. I called them on a Tuesday so I decided to give them the full three days. The debit order date for the loan was the 15th which meant that I was debited and settled the amount on the same day. After the two days I had logged on to the Nedbank Money app and saw that the settlement and the debit order appeared on my profile. And I had to be credited with R6700. I called Nedbank on Monday which was now the 5th business working day. I was told the consultant that assisted me when I called on the Tuesday did not close my account but the consultant that was assisting me promised that the amount that was due to me would be paid and the paid up letter would be emailed to me. I waited the entire day and kept checking my email. Nothing happened. I then reached out to the Nedbank on Twitter hoping they would assist me. But they have been sending me from pillar to post. I have not been assisted. Today I was told by the social media specialist on Twitter that apparently the loans Dept needed the proof of payment. I asked them if this was a requirement why was I not informed from the first call or numerous consultants that I had spoken too. I am appalled by the service I have received, I have concluded that I will never ever do business with this bank. I am looking to buy two houses this year I wanted to use this bank but after the service I have received I will rather pay more elsewhere.