Voucher not sent after purchase

WHAT AN EMBARRASSMENT. WE JUST WALKED OUT OF THE RESTAURANT NOW BECAUSE HYPERLI HAVENT SENT ME A VOUCHER FOR A DEAL I PURCHASED ON THE 25TH NOVEMBER. IVE NEVER HAD THIS ISSUE WITH GROUPON, SO WHEN I SAW THE INVOICE SENT TO ME,I ASSUMED THAT THE VOUCHER FOLLOWED BUT TO MY SURPRISE....

I WILL NEVER EVER BUY VOUCHERS FROM YOU EVER AGAIN?