Wesbank poor customer service

My account was settled in August 2019 and later that month I logged on to check if everything was fine and the system showed my account was closed and Wesbank consultant Banele Mabe confirmed that today. After 5 months, Wesbank sends me an email telling me that I owe and threatens me with interests, lawyers etc. Banele Mabe gave me attitude and wouldn't explain how all this happened. When I asked to speak to his senior, he told me his manager does not speak to customers I can only deal with him. With attitude he told me if I don't pay then he will reload the account and I have to pay interest. Such poor customer service from Wesbank and it was their fault this all happened and they only picked it up after 5 months.