Not honoring deal

<p>I purchased a groupon voucher last year with the lions or nothing promotion, when trying to make a reservation i was first told that there are just no dates available in the maslow in april. i tried again today and was told that the promotion is only until 1 april 2017. i wanted to book for 22 april and the voucher clearly states that it is valid until 30 april 2017 and i can even provide a copy of this as proof. I dont understand why sun international would have a promotion and when it comes time to use then not give the reservation.</p>