Discovery vitality iwatch offer no refund

So I decide to take the iwatch, order online via the vitality discovery app. Pay the R999. Then decide to rather reverse the decision. So I call discovery and they tell me if I cancel, I will forfeit the R999. How is this possible, legally there is a consumer cooling off period, and I should have the option to cancel for a full refund. I have not activated the code it taken ownership of the watch. So therfore I should be allowed to cancell and recieve my refund. I was told in terms and conditions, I would loose my activation fee... This is unacceptable and I intend taking this matter further if not resolved before COB 24th December with a full refund to my discovery bank card