I am having trouble with the Spotify Premium 60 Days free campaign. I had a mail saying that it will be 60days free premium offer but after starting the trial, it says it is only 30 days free premium.
By the way, I'm a Spoitfy Japan user.
Sorry to hear about this problem.
I suggest you contact support so they can help youhttps://support.spotify.com/contact-spotify-support/
If you get an automated reply email telling you to check the help section or the community, you need to reply back to it, even if it's from a no-reply address.
Support usually replies within 24-48 hours.