Is there anyway i can unsubscribe to ps plus, my playstation is broke so i can't go and cancel it.
Welcome to the PlayStation Community.
I would suggest contacting Sony customer support regarding this, their contact details can be found at the bottom of the screen under the "contact us" tab.
By the way you won't be able to "cancel" your current subscription of Plus, that will continue running until it runs out, but you will be able to cancel your subscription so it doesn't auto-renew when your current subscription ends.
Customer Service - 1-800-345-SONY (7669)
Account & billing Support -1-877-971-SONY (7669)
Available Mon to Fri 8am - 8pm PST