Pathetic bank with pathetic service

On the 21 October 2019, I complained to FNB via e-mail after I noticed on my credit report that I owed them R 2 260.00. I received an e-mail response 7 days later from a Jason Davids, that did not bother calling me to explain what this money was for coz as far as I'm concerned, I DO NOT OWE FNB A CENT. Till date I have not received a response or a call from FNB to explain themselves as this has messed with my credit profile for a long time. And if it is not rectified ASAP, I am switching to another bank with better service that the pathetic service received from this pathetic bank thus far