Poor service FNB Credit Card Division

I am a but disappointed with FNB credit card division. They have contacted me 5 days ago to do an application for a credit card to which I was approved for. I was requested to submit proof of income, which I have done 3 times already and received mail acknowledging the same from ***, 3 times as well. I even sent through id and proof of residence as well. I called the customer care line yesterday and a consultant tells me the application is still open as they still require proof of income. I am confused as I have already sent this and they confirmed receipt. Nobody has called me to request anything further. I would really like progress on this and to know whats going on and if I will be receiving the card or not. Communication from this division is very poor.