I tried to activate my giftcard, but it failed several times. After five tries or something like that, it finally worked. I never changed something in the code! Then I clicked to verify my card and I got another error message. But when I looked into my Spotify-App it said that my premium was activated. I listened to my music offline and everything was fine.
The problem now is, that my premium status is gone. I don't know why. I threw the giftcard into the rubbish bin and there is no way I can get it back. Is there any chance that you guys can activate my premium again?