Credit card online application nightmare

My fiance app**** for a credit card online over 2 weeks ago. He received an sms saying he's provisionally approved and to email his documents and he did. He kept receiving the same sms daily. He kept on calling Nedbank and every time he's told the Credit card assessment department will call him.

What worries us now is that they say they've tried to call him 3 times which is not true. They only called once and the phone rang for 3 seconds and was dropped, he's the one who's been calling Nedbank. He recently received an sms saying in order not to miss out on greenbacks rewards, he must download the Greenbacks App.

Nedbank must either decline so that there's proof that the credit card was declined or approved. He doesn't want to be a victim of *****.