Discovery Vitality fitness booster failure!

My wife bought a Garmin watch for R2600 in May 2018, we registered it under Healthy Gear and received the 15% Healthy Gear monies. After noticing that we were not getting paid the monthly fitness booster money each month even though my wife met her weekly/monthly fitness goals, I phoned Discovery Vitality and they explained that no fitness booster will be paid out as we used the incorrect Healthy Gear card number(mine, not hers as it was not issued yet). I asked if this administrative error could be corrected and it was explained to me that this was not possible and we would not earn back the remaining 85% of the R2600 purchase price even if all weekly fitness goals were met for the remaining period. Seriously Discovery, this is just not good enough! We bought the device on the premise of receiving the fitness booster monies for meeting our fitness goals, and frankly your agents never even tried to really assist us. Very disappointing service.