They haven’t told me why it happened. They’ve told me they contacted Amazon and haven’t received a response back yet on my case.
I’ve emailed them back just now telling them I would like to receive a refund for my purchase, if the issue remains unsolved by tomorrow, since it will be a week since the reported incident.
It is good that they kept their word, especially since the problem did not appear by them. Have you contacted Amazon? What happened to your account? Is it back again or is it still frozen?
Perhaps what happened is a problem in the connection between the third party "Bitrefill" & Amazon and thus the gift cards became illegal.
Good luck and I hope you recover your account.