I'm trying to buy some vouchers for the movies from rewards.one.nz - the website seems to work okay (except for showing session times, but it seems they have just moved to straight vouchers). When I get to the payment processing page, I enter my credit card details, and then it comes up saying declined. 

This has happened with two different cards, and is not a funds issue. 

One is Visa, the other is mastercard. Both declined. 

Anyone else used this site recently?