Non existing phone numbers and no email feedback

Its impossible to cancel existing insurance with Wesbank/ Nissan Insurance. Your website says customer service is ***which is actually Collections. After verifying information, I'm then transferred to the actual client services. After verifying information, I'm transferred again to a consultant and every time told the number in question does not exist and the call is cut. I've repeated this process several times. There is also no action taken to any email correspondence. Completely broken infrastructure.