Predatory business tactics

I have been a loyal WesBank client for years now and have a couple of vehicles financed with them. As part of their contract they require annual proof of insurance which is reasonable. They sent me a request for said proof which I provided. They then proceeded to threaten me with a compulsory WesBank insurance charge if I do not comply. I resent the proof of insurance. This happened three times and thrice I responded with proof of insurance.

WesBank have now charged me with an additional insurance charge on a motorvehicle that is already insured .

WesBank please Do Not employ predatory business tactics if your back office systems are not able to handle the most mundane of tasks such as recording pre-existing proof of insurance. I believe this matter to be one for the regulator