Re: "Cancelling an app/subscription:
I only want a free trial. i cancelled on my settings but I think still trying to charge my card on file".
We are all Apple users, like yourself, in the Community, so no-one here can access your account.
Seems a free trial needs to be cancelled at least 24 hours before it expires if you do not want to be charged.
How to: cancel a Subscription from Apple
If you want to cancel a subscription from Apple - Apple Support
or
if the subscription is not from Apple:
The best source of help for a product not made by Apple (a third-party product) is the company or person who made it—its vendor or developer:
How to: Contact a third-party vendor
Contact a third-party vendor - Apple Support
More info. / support / contact:
Billing and Subscriptions Support website:
Subscriptions and Billing - Official Apple Support