FNB bad service

Such bad service at the fnb credit card limit department. I called and asked for an increase on my credit card about 2 months ago. I forwarded the documents required to [Email Removed] and after 2 weeks no response. I phoned again and was told my documents were never received I must resend to [Email Removed] again no one got back to me and I phoned after two weeks and was told to resend everything along with a foreign declaration and letter from employer which I did and again waited 3 weeks no response. Today I phoned and im told they never received the documents! Do their emails not work??! I asked to speak to a supervisor and none are available. I'm really disgusted.