Discovery Vitality customer service is terrible

I activated my shoe booster on 7 October 2017 and purchased a pair of running shoes from Sportsmans Warehouse.. As of to date, no cash back has reflected in my account. I have achieved all of my monthly fitness goals up to now as well. I have made several enquiries into the issue and received several unacceptable responses. The customer service at Discovery Vitality is very bad. First I was told that I had not paid the activation for Vitality. When I provided proof of payment, I was told my shoe booster benefit was not activated. When I provided proof of my shoe booster being active, they told me that I swiped an inactive Healthy Gear card at Sportsmans Warehouse. When I responded that I did not know the card was inactive, since Discovery Vitality issued me with 3 cards, it was discovered by the consultant that Discovery Vitality in fact issued 8 Healthy Gear cards to me. Then I was told by the consultant that they could not refund me the shoe booster cash back as their system was swapped to a new system. I find all of this completely unacceptable. I followed the steps to get my shoe booster benefit to the letter and I feel that Discovery Vitality is doing absolutely everything in their power not to honour their commitment. I am deeply disillusioned in their benefit program as my wife has had a similar struggle with Discovery Vitality.