Hello I am trying to claim my Sainsbury voucher and only thing I can see is: "An exceptiona has been raised within the callback" What now?
I'm also facing the same problem. Hopefully a modeartor will step in - they seem to have helped on similar problems for others on older forum threads.
I'm really sorry about the issues you've had claiming your voucher, I've highlighted this to the gift card team and we'll
post back as soon as we have an update.