Momentum cant get the basics right

I have various policies and gap covers and medical aid with this company. It costs me thousands a month, yet they keep getting my very easy adress wrong. I have asked the call cwntre and my broker to change the adress, yet they cant get this simple thing right. What if i actually have a problem??? I have lost faith in the s****s of this business and all my policies are with them, will have to start thinking of changing to a comapny that gets the basics right. I have never claimed, but at this stage i am scared of what would happen, since they mess up even the most basic things, but they will never make a mistake when they have to deduct your premiums.... funny how that works....