Apple randomly charged money to my bank after staring a free trial

It looks like what is happening, is the merchant has the <free trial> set to do a <Pending> charge of $24.21 that includes tax to make sure there is sufficient funds on your account, should you not cancel during the trial period, and the charge needs to be processed.

This charge will typically fall off after 5 days. However, you need to cancel 24 hours before the trial is set to expire. Do not delay in canceling your trial, if you have no intention of purchasing the trial. If you do not cancel during the allotted time frame, the charge will go through and you may be declined a refund.

Please follow the steps in the Apple Support article I linked below cancel your trial subscription.

If you want to cancel a subscription from Apple - Apple Support

Look and see if your subscription is shown here;

https://reportaproblem.apple.com/

If the charge doesn’t appear there, it may not have processed yet. You can wait several days an look again or contact Apple Support using the information and links in the Apple Support articles I shared below. If in the US call 1-800-MY-APPLE

Set up and use Savings in Apple Wallet - Apple Support

Choose your country or region - Official Apple Support

Ok, what device are you on, iPhone?