@jaczenon wrote:
Please cancel my subscription monthly for $19.99 NOW.
No one here can do that for you. You need to cancel your subscription yourself, either through your Plan page (if you upgraded on the website) or through your mobile device (if you upgraded through an App store). Otherwise you would need to contact Support directly.
To contact Support, visit the Support page while you're NOT signed in to a Dropbox account, including these forums, and you'll see an option for Billing issues. It's best to use an Incognito or Private browsing session to make sure you're not signed in.
Also note that in most cases, payments for Dropbox subscriptions aren’t refundable. To verify that's the case for your account, you would need to contact Support directly.