Credit Vetting

Hi, I done an online application for the October big deal yesterday 04/10/2017. Everything went smooth except for: - I was not given an order number or reference number even though the call center said I would be sent one. - I have a clean credit record and i received the following sms: "Dear customer,Unfortunately your order has been declined during credit vetting. Regards Telkom Sales Team"

I don't understand how this order can be declined.