How do I cancel my card from getting charged $9.99 from

How do I stop payment of 9.99 every month

Do you have an iCloud+ plan subscription?

Please check -> Go to -> Settings -> your name -> iCloud -> if you see 50 GB (or 200 GB or 2 TB) then you have an iCloud+ plan subscription.

If you have an iCloud+ plan subscription, you will receive a monthly bill from Apple, check your email box.

If you want to stop your iCloud+ plan subscription, see this Apple article: Downgrade or cancel your iCloud+ plan

Downgrade or cancel your iCloud+ plan - Apple Support (PH)

or

Check your mail box and click the last Apple invoice you have recieved for you iCloud+ plan. 

Then scroll down & see:

👉 If you have any questions about your bill, contact support. This email confirms payment for the iCloud+ plan listed above. You will be billed each plan period until you cancel by downgrading to the free storage plan from your iOS device, Mac or PC.

Go to this site and follow the steps to cancel your subscription for App Store or Apple services.

Subscriptions and Billing - Official Apple Support