Horrible Service

I have 3 funeral policies with Old Mutual. In May, I called them, informing them of the change of banking details. The lady was extremely helpful and changed ALL. 3 policies while I was in the phone with her. She promised me that all 3 policies have been updated. Los and behold, end of May TWO of the THREE policies got paid but 1 policy was not updated. Immediately my credit rating got influenced due to “NON PAYMENT” but this was not even my fault? How is Old Mutual going to rectify this mess? I refuse to call back again and their online app has my wrong information hence I cannot even fix it on my side. Old Mutual sucks😡😡😡