I'm unable to redeem my voucher. Getting stuck at Hold on a sec... screen. Tried 2 computers and mobile. All fail.
Same issue here. Valid Sky Entertainment voucher purchased from Currys-PC World. Sent a complaint ticket a few days as it was looking impossible to contact them any other way. But not heard anything yet.
5 days left before it needs to be applied.
OK so I fixed the issue. I don't know which step helped but here's what worked for me:
1) fix system time in Windows (my NTP server was off)
2) use Internet Explorer instead of Chrome
Then the "Hold on a sec..." message was followed by credit card charge confirmation (although the charge was in my case £0.00) and then the voucher was applied.