New contract approved then declined no feedback

I app**** for a new contract on 24 November, note I already have 4 contracts with cell c, always paid and I've been a loyal clients for 10 years. I called the famous 084145 number spoke to Romano in sales, he put through the application,Naomi from credit vetting called saying it was approved, all I advised her was that it was the incorrect phone could she change it. I got no feedback so I kept calling, only to find out that it was declined, I left numerous messages for Romano to call me, and as far as who Naomi is its shocking that I've called all numbers possible and no one can trace a credit vetting department. How can she approve a contract then decline it.i really don't believe that I should be running after cellc they should be trying to keep me as a client.