FNB NAVCAR license disc refund

FNB is a good back, no doubt. I made a mistake trying to renew my license disc using NavCar on the fnb app on the 2nd of November, called them on the 2nd of December and they wouldn't refund me. Holidays approaching, licensing department won't reprint my motorbike license disc because of the outstanding car disc. I'm stuck with 2 unlicensed vehicles. All I need is a refund so I can do this manually. Please