Not getting assistance from Nedbank Credit Card Department

I would like to lay a complain against Nedbank credit card department, they called me on the 23 June to offer me a card and i accepted and the consultant i spoke to asked me to email him my 3 months bank statement, of which i sent and from the 23 June i have been calling every day to get feedback but who ever i spoke to could not assist me they preferred that my application must be completed by the person who called me initially but when they tried to transfer me to him he refused to take the call and said it must be escalated because he cannot speak to me, for what reasons i don't know? after that my application was declined dues to incorrect details, when i call to find out which information is missing they said they are missing May and June salary of which it was there, i had to highlight and mark everything for him to see but after i sent the marked statements no one rep**** or called me i have been calling everyday and leaving messages for the consultant and he does bother to call me back or even attend my case. last week i put a complain through the complains department of which they promised to get a manager to call me back in 24 hours and no one called me. i am definitely not happy by the way i was treated by Nedbank as a whole, costumer service should be their number 1 priority but the service that i received was not satisfactory.