Vetting application declined

I was offered a new line through one of vodacom's approved partners Mondo. Unfortunately just after my application was made, I received a sms stating my vetting application was declined. I phoned vodacom customer care and was advised that the accounts department declined it and they would put me through. According to the accounts department everything on their side is fine. I'm trying to find out why my application was declined if everything is fine according to accounts