Service delivery at lowest of low

After fighting with FNB premier for the last 3 odd years I am.fed up. I have send them mails ( 100s) without resolution or response at times. If i complain I am told that I will be comtacted within 48 hours which becomes 5 to 10 days. They never have an answer and always blame someone else for incompetancies. They do as they like and set their own rules most of the time. They.make as if you whom.pay them.is to blame and all this is at a cost to me or you as a client. I.must add that the ***** department goes out of their way at times to.assistbut then again the bad overwelms the good every time