Spotify premium

[Alma8]

In my account it's said that Spotify premium will be able until 13/03/2017 (before a new payment), but in my references in the app it's said that the offline way will be disabled in 29 days. Why?
Thanks

[Joe]

As explained here, "You do need to go onto the internet at least once every 30 days to maintain your offline music settings.".