Poor service

I have received a very poor service from FNB. Last month I app**** for credit card limit increase. I called them using their branch telephone. I asked the consultant who was assisting me on the telephone when can I expect to receive the money. She told me I'd receive it right after talking to her. I confirmed with her if there aren't any documents needed for them to process this, she told me they won't need any. I left the bank, on the following day there was still no money on my account. I called them, another assistant told me that the one who was assisting me was supposed to tell me to at least wait for 48 hours to get the money. On a 4th day I called them again, because they never keep in contact with a client. They told me that I should email my 3 months Payslips but I confirmed with them so many times if they don't need anything from me. I emailed the Payslips they requested but up until today I'm still waiting for their response. No money in my credit card and no one is informing me of anything. I feel like they're ***********. #WIN