Spotify Premium ended, now what?

[Skyblue19]

I purchased Spotify in November 28th, last year when it was the offer of 3 months for $4.99 and that ended on February 28th I guess. So my question is, what I have to do now? Cause the music that I downloaded still is there, and sometimes shows up a message about payment, and I wanna know if I'm gonna be charged by the end of the month, and if I need to do something to prevent it, I need help a.s.a.p Thanks in advance 🙂