Sony has a no refund policy, but sometimes make a one time exception.
They also warn you that Auto-renew is on by default when you start a trial, or purchase a subscription, you just clicked through the warning without reading it.
As for support the phone number is 1-800-345-7669 or if you prefer live chat is here https://support.us.playstation.com/articles/en_US/
I have recently been charged with a playstation now subscription. I do not want this service nor do I know how I subscribed. I would like to unsubscribe and possibly be refunded for this unused service.
Hope So cause I made the mistake of giving it a try and I hardly had enough time to try out any of the games for my Free Trail Run from Play Station Now it's asking for $19.99 over some games I already deleted after only doing one gaming session with them. Ugh
You can't cancel a subscription that has already started. You can cancel automatic renewal of the PlayStation Now subscription the same way as for any other subscription...