Dischem gift vouchers ridiculous.

Dischem gift vouchers are ridiculous. I received a R500 dischem gift voucher. When using it YOU MUST USE THE FULL VALUE IN ONE PURCHASE !!! How ridiculous is that. You cannot buy a few items say total R200. If you cash in your voucher of R500, you loose the R300. YOU DO NOT GET ANOTHER VOUCHER FOR THE CHANGE!!! Guys, learn from Clicks. They got it right.