Hey, it seems they've been dealing with some trademark issues related to the "Spotify" name, which led them to rebrand and move their services to a new domain: https://streamingmafia.com/. The good news is that all your account details and balances should remain intact on the new site. So, just head over there, and you should be able to login! You can also check the thread about this issue on https://www.blackhatworld.com/seo/is-spotifypanel-down-i-havent-been-able-to-access-it-for-more-than-3-days.1649003/.