Hyperli Merchants ****med me, paid but couldn't redeem

I bought 2x vouchers worth R700 and the merchant won't let me redeem it because of an honest review I had of them on my hyperli account. I go back to Hyperli and they have 30day refund policy. I purchased a spa voucher and the merchant closed down few months later. Hyperli won't refund me because of the same policy. I've lost over R1000 on these vouchers and I couldn't redeem them. Hyperli and the merchant have split their profit with my money but I haven't had the service. How is that fair or even legal? Hyperli needs to vet these merchants because at this point this is a ****. I've paid money but never got the service so I am actually ****med. And I've used hyperli for so long I trusted its deal but now it seems there is a scheme to rip us off.