Cell C does not want my business

I pre-ordered the 64gb iPhone 6s from Cell C because they offered the best deals on the market. (Well done on that). I planned to port my number from Vodacom to Cell C because my contract expired. I promptly received a call from a Cell C service agent who informed me that I could not be vetted because of ITC. No further reasons given. This was pecu**** because I have never defaulted on any payment for the past 20 years and my credit score is above 800. (As shown on my Experian report). I also earn R1m a year so affordability can't be an issue. I serve 9 contracts and I never defaulted once. The only reason I can think of is that I cancelled two Cell C contracts in the past but I paid the outstanding balances immediately so I owe them nothing. If this is the case, please inform me so that I know to avoid Cell C in future. But not to worry Cell C, after this experience, I just went into the iStore and bought the phone cash and I am still with Vodacom. You can check my credit record on the ID number supp****. J Wilson