Classic terrible service from SBSA

Have sent numerous emails to cancel Standard Bank cover as they have been charging me for 3 years in my homeloan debit order when I specifically stated in the application that I have my own cover, spoke to one of their callcentre agents who told me to email omins@standardbank with proof to process a refund of my premiums as I have been covered by 2 policies for the past 3 years. I have sent proof of this, again on numerous occasions but its like talking to a wall. Terrible service and exactly why I moved my banking to FNB 5 years ago. Cannot wait to move my bond as well.