@TeamYouTube I signed up for a one month trial of YT Premium on 9/9, and cancelled it on 10/8 so it wouldn't renew.
Card statement now says I was billed $12 on 10/10. I clearly remember the app asking me to sign back up a few days ago, I declined yet I was still charged.
Thanks for reaching out. Our YouTube Premium purchase support team can clarify this for you. Please get in touch with them from here: https://goo.gl/m11wvR . Hope this gets resolved.