Apple taking money of my paypal balance since the card is locked.

If you think Apple "should" do something differently, tell Apple. You have posted in a voluntary, user-to-user technical support community. Responses are exclusively from other users like yourself, not Apple who likely won't even see what you posted. Click on this link for Apple products feedback links --> Product Feedback - Apple

Apple may not respond but your comment will be read.

It should not be a surprise, when your authorize the free trial by double clicking the side button, there is a message on the screen that says to avoid the subscription charge you should cancel the trial a day before it ends.

If you have trouble remembering to cancel a free trial and not interested in the subscription, then I recommend setting a reminder to cancel. It is as easy as saying: " Hey Siri, remind me at xxxxxx to review my free trial". Problem solved!

That way you are responsible for your own actions. It works for other companies too, as that is standard practice for any free trial.

• HULU

Your first payment will be charged to your chosen payment method immediately following the free trial,

https://www.hulu.com/subscriber_agreement

• AMAZON

While you won't be charged for your free trial, you'll be upgraded to a paid membership plan automatically at the end of the trial period.

https://www.amazon.com/gp/help/customer/display.html?nodeId=G6RZ3AA6NQMCKYEM

• GOOGLE PLAY STORE

When you subscribe to Content for a price, you may receive access to the subscription benefits at no charge for a specified trial period, after which you will be charged until you cancel your subscription. To avoid being charged, you must cancel before the end of the trial period.

https://play.google.com/intl/en-US_us/about/play-terms/index.html

• Microsoft 365

Note that you'll be asked to provide a method of payment so there's no interruption in your service after 30 days. After the trial, Microsoft 365 Family is  $129.99/year .

https://www.microsoft.com/en-us/microsoft-365/try

• Walmart+