Second Reward voucher invalid

I am really pass disappointed that after my daughters original Burger King voucher was invalid, Absa provided us with a new voucher after a very long wait, only for the second voucher to be invalid as well. You can think what she think about Absa's Mega-U rewards program. If this is how Absa treat their young customers, I think it better for them to rather s**** the entire rewards program if they don't know how to properly manage it. Unless they get off by letting kids down.