Standard Bank's shocking harassment and incompetence

I am not sure if Standard Bank enjoys the negative publicity it has recently enjoyed on social media and the news. My father has been constantly harassed by the staff of Standard Bank for R25 for a Petrol Card he never received and has been threatened that he will be handed over to their attorneys. My Dad is almost 80 years old and critically ill, these telephone calls and constant threats are causing him endless anxiety and stress. I have managed to answer a number of these threatening calls and they refuse to speak with me despite explaining the situation. I have also sent an email to their Head Office to complain and they responded fairly quickly requesting my father's contact details!!!!!! How *********** can one get, even after I explained that my Dad is critically ill and will not be able to conduct any conversation over the telephone. This is for a measly fee of R25 for an account that my Dad never availed of. I am sure that the cost of the attorney to trace my Dad will be astronomical despite the fact that I am constantly engaging with them to resolve this matter