I want to delete any payment in the futire . Pls help me

You may need to have a valid payment method on file, even if the app you want to download is free.

You can have a credit card / debit card on file and an Apple Account balance.

If you have set your Apple Account balance as your default payment method, your default payment method will be used first by Apple when you need to make a payment.

Some purchases might require you to have a credit card on file, even if you use your Apple Account balance to make the purchase.

See -> Remove a payment method from your Apple ID

Remove a payment method from your Apple ID - Apple Support

Perhaps this may help?

Remove a payment method from your Apple ID - Apple Support

//support.apple.com/en-us/HT203905

"You can also remove a payment method after signing in to appleid.apple.com.

In some countries and regions, you might need to add a new payment method

using appleid.apple.com in order to remove the existing payment method."

..Hard to tell, as an 'end-user' and Volunteer here myself.!