FNB consistent in offering a bad customer service

On the 19th of April I sent through a dispute to fnb and I still have not received any feedback from them, trying to get a hold of them telephonically is a nightmare, and trying to use the chat service on the app is an excruciatingly painful experience because the bankers take a min of 15min to respond to a message... I have honestly had it with fnb and the shoddy service