Ordering seeds how to activate vip discounts

When ordering seeds, how do you activate you vip discounts

I signed in and had to go to support menu to find vip program and it looks like i have a reward of 20.00 dollars, however when i tap get reward nothing happens , thanks anyway, i saw another site with the same seeds

The higher the reward vocher, the more you have to spend to use it which i think it bs(my opinion) but i have to spend $150 to use a $40 that i earned spending money with them.