To stop all charges, on your EC2 dashboard it should say 0 instances running and 0 volumes. The EC2 dashboard is per region. If you have services running on a separate region, you have to go to the dashboard for that region to see them.
You can also view everything you are being charged for from the billing page. Go to this page
https://console.aws.amazon.com/billing/home#/bills find what you are being charged for and stop each service.