Frustrated spotify customer

I canceled my premium subscription 3 months ago, I was notified about being debited for one month before switching to the free plan but I've been debited for the past 2 months. I've contacted my banks to try to stop the subscriptions but they told me I can only do it through Spotify. I've downloaded Facebook to try to message their support line but it gave me no option to send a message. I'm extremely unhappy with this survice.