************** at FNB

I recently wanted to upgrade my bank account at FNB on the app from the Gold Cheque to the Premium Cheque. It did say that the account has been successfully upgraded and that I will receive a call from them in which I have not. I did call a number that was provided and was advised that I do not qualify. I would like to know why am I being declined is it because I have not come through as a doctor? I did advise that the account will see more than 20k a month as I will be receiving two salaries into it that will cover its charge. On what terms exactly am I being declined? Kindly advise via email. NB. Please do not make it a branch issue as they did offer it to me and at that point I chose the cheaper option.