Disgusted with FNB after banking there for over 40 years

FNB Credit Card - Disgusting customer service. Emails are sent with no information specifying contact FNB on this number and the number is a not valid phone number. They claim you are a non exisitent customer , when Ive baked there for over 40 years. They claim they cant get in touch with you when no one tried. I called 4 time over the past few weeks and very time its ill log the issue soemone will call you - No call. I called and spoke to 8 people today and no one can help me becuase the Credit Card department dont know how to deal with requests for information.