Angry and frustrated loyal customer

This is my second time complaining about the terrible service I get from FNB and not much has changed. I am trying to switch my home loan from standard Bank to FNB and it's been an extreme Pain.litterally Everytime I need feedback I must the guy dealing with application and half the time he does not answer his phone, when I eventually get hold of him I get promised to be called back and he is always too busy to call me back. FNB Should let me know if they have had enough of my many years of being a loyal customer so I can move my banking elsewhere because I am sick and tired of being treated like a second rate customer.