Misleading the public

I was invited by by African Banks head office to apply for credit which I may qualify for. The assessment was done and I qualified for a few loans and credit card. I decided to take up the credit card option and was advised that I needed to visit a branch for this option which I did. At the branch again an online assessment was done, I qualified for a gold credit card, submitted all my documents. I received an email whilst at the branch that the credit application was successful. The agreement was signed, credit card issued and activated. Today I received an SMS from a random number advising that ... " sorry your loan application was rejected" I then called the number and was advised that it was on of the consultants that it was African bank branch in southdale I visited in southdale on Saturday. She checked the system and said reason for rejection was blank. She advised me to call head office which I did. The advised then the reason for rejection was verification. The bank put me through all the motions, issued the card, let me sign the credit agreement only now come back and say loan rejected with no reasons, no formal SMS or email or proper call. Very dissapointing What happens now?