FNB Nightmare

Last week I decided to change my banking business back to FNB. Initially everything went well, the call centre agent was professional and very helpful. I was pre-approved for a FNB Private suite which I didn’t except but instead took the Premier bank account suite which Includes a credit card and overdraft. I wasn’t asked to submit any supporting documents but then the nightmare started. My FNB credit card was approved and out on delivery but the overdraft account FNB refuses to approve because they need a new signed work contract. I have explained that I have been with my current employer for nearly 12 years, I have submitted 3 month bank and payslips and annual increase and bonus letter on a official letterhead but still FNB is asking for a employment contract. Please can somebody help me end this nightmare.