Is OTHER wrong in the post ? POST : (Tl;dr at the bottom)

I have a Spotify premium account, and when we started dating, she asked if I would let her share it with me, and of course I said yes, gave her the log in info and whatnot. That was a year ago. We broke up three months ago and she’s still using it. When she asked initially if she could continue doing so after the breakup I said yes at first, simply out of guilt, but now, it’s starting to seriously piss me off because we did NOT end things on a good note, we are certainly not friends anymore, and thus to me there is no reason I should be letting her mooch off of my paid account. I can’t listen to music on there half the damn time now without getting a message “You are playing music from (ex’s) phone”, because as anyone who has ever used Spotify knows, multiple people can’t be listening at the same time. 

Tl;dr: My ex, who now has zero contact with me in any other way, is using my Spotify account for free because I let her use it when we were dating. 

WIBTA if I cut her off? 