Vodacom Contract application blocked

I app**** for a Vodacom contract and it was declined. After I enquired about the reason, they said I should contact Experian as Experian is blocking the contract application. I tried calling you call centre to no avail... Phone just keeps on ringing for 20 minutes with no answer. Can you please give me a reason for the contract to have been declined? And I really hope this is not about the debt review status that should have been off of my profile in May already?