I don't have a hulu subscription but was charged for it on roku and I am trying to figure out how to get my money back and cancel it also?
Find the email address for your account by going to Settings->System->About. Use that email address to log in at https://my.roku.com and check your subscriptions.
I did and it said I did not have a subscription so now how can I get my money back?
To be honest, I'd start with the financial institution. Report it as a fraudulent charge. Find out if the charge really came from Roku. Just because the description for the charge mentions Roku doesn't mean anything. If you want to try going through Roku, you'll have to jump through the hoops at https://support.roku.com/contactus . Be prepared to be disappointed. If no subscriptions are shown they probably won't help you.
Okay thank you