Flagged as *****??

I tried signing up for a new first time contract with MTN. Was told 2 to 24 hours for the phone to arrive. Been following up daily for a week with three trips to the store to enquire. I have now been told I have been flagged as possible *****. Though the branch has tried to escalate and motivate it still flags me. I have an excellent credit line and no explanation is given for this insult. How do I get a contract or talk to someone to get help? Worst service ever and very insulting to add.