I'm pretty sure i sent you the right gift link, anyone else has access to your PC that could've taken it? i don't really know how to help here.

By the way when you tried to activate it? cause i see two messages from you here, the first is 1 month ago and it didn't show up in the notifications, while this is from 2 hours ago. That's a really long time gap there.
Besides why check the gift as received one month ago and change it only now to non received? not accusing you, just saying it's strange.