Nedbank Pathetic Service

Pathetic Service from Nedbank. I called the bank as they debited me more than they should have for my personal loan. 9000 to be exact when I contacted them they said that I need to email enquiries they were not receiving payment from me despite trying to contact me. When I asked the lady did you contact me please give me proof she has an attitude and says we tried calling and left messages for you. How is that contacting me as a person not once did they inform me they where not getting their funds. This is now the second time this has happened and when I asked to speak to someone I can escalate she says I need to email. So what am I to do now sleep in my car tonight until I have my rent money. I have contacted my lawyer and what nedbank has done is ******* and I'm pretty sure they have done this to other. I will definitely be moving to another bank.