Hello Meowington.

Thanks for the information. In the future, it's helpful if you post about the issue in the giveaway comments so the giveaway creator can have a chance to send you another key, etc. The giveaway may be contacting HumbleBundle about the issue to reset the link, or ask for your assistance in whether you agree to delete the giveaway, so keep an eye out for any communication.

Have a nice day.