I bought my Netflix code on 24.1 and today it stopped working. Email from Netflix say:

"We appreciate your interest and continued use of the Netflix service. Our records indicate that a Netflix Gift Subscription that you redeemed was disputed and therefore payment for the Gift Subscription was denied to Netflix. Due to non-payment of the Gift Subscription, this account has been cancelled.

We would be happy to have you as a customer. As a courtesy we will not ask for reimbursement for the service already used. However, we will be unable to honor the remainder of the Gift Subscription. You would be responsible for the monthly membership charges on your account."
And then the email has a guide on how to restart the membership but the discount is gone for good!