Discovery Vitality reward gone bad

Recently bought a Cape Union Mart voucher for 1500 miles, "worth" R500. No Terms and Conditions were stated upon advertising of the voucher, only when the voucher was bought, it stated no sale items. I checked on their TC's on their website for which items qualify for this voucher redemption and most of the items there's only XS small sizes available. Many items on the list is not even available ay Cape Union Mart. One of the nice puffy jackets is only the list, the mens siya hooded jacket, but is on sale and apparently not for redemption with this voucher. This "reward" has so many grey areas and is really not worth it. I believe Discovery Vitality should reimburse our rewards. This was a real boeboe reward and one of the most terrible rewards bought from them