Declined contract after giving personal info

Very disappointed with Telkom. I recently app**** for a cellphone contract and was contacted the next day by a consultant to verify some questions before putting my request through. everything went on well and the consultant asked me for my banking details and my address as well as which colour i wanted the device in. I gave all this information and was told that I would be debited in 24-48 hours and would receive my cellphone within 5-7 business days. The day after the call i got an sms from Telkom telling me that my request was declined. something about vetting. why did they take down all my private details (bank details/address) and ask me which colour i want the phone in yet decline my request!!!!!