out of stock rewards program

dstv rewards program is a total waste,they do not give enough description on vouchers and for as long as i can remember,the uber eats voucher,the only actual voucher that's usefull is always out of stock,please explain this.I have been checking rewards since day one and it has never ever once been available,come on if you want to do better,be better.You want to keep customers happy,you start there,you want to draw attention and have us talk about it,step up please