Faulty and Invalid proof of payment code

I have bought the Apple Watch through the Active Rewards benefit and have received my proof of payment code on Wednesday 2 December 2015.<br> <br> Arriving at the Cresta iStore to collect my watch, I am told my proof of payment code was INVALID and FAULTY.<br> <br> After 3x calls to the Call Centre to Anton, Tintswalo and Stephanie, my call has not been resolved in 36 hours.<br> <br> So far it has been an unpleasant experience.<br> <br> Call Centre advised to wait indefinitely until it has been resolved.