Healthyfood cashback

I registered for the healthy food cashback in March 2014. I have yet to receive any cashback or points for this. I linked my Woolworths card as advised and logged numerous incidents indicating that my profile shows I have never used this benefit to which i receive an email apologizing for taking weeks to get back to me saying that i will get cashback at the end of the month. This has never happened. My profile on vitality still says i have never used the benefit. I have followed all the steps in order to use this benefit and after a year I still haven't been able to.