Q: App refund

It's not entirely clear from your post, but it sounds like you bought apps from the iTunes Store that you want a refund for. If so, that has nothing to do with Apple Pay. Go to http://reportaproblem.apple.com and find the apps there, then request a refund. If you've already done that, then contact iTunes Support at http://apple.com/emea/support/itunes/contact.html.

No, because app purchases/refunds are not processed through Apple Pay. You need to change your payment information on your iTunes Store account, not Apple Pay.

i can not need to order purchase in app but make from my son.

Please help return the money to credit card me.

I Question of refund Apple will reimburse i don"t????? my son purchase in app he remember password but ,i make sure confindent that the defense is not allowed to buy it.

1.MXDLFW4G0W

2.MXDLFW27S0

3.MXDLFW23VQ

4.MXDLFW1Z26

5.MXDLFW1GBW

6.MXDLFW15JL

7.MXDLFW0DLS

8.MXDL8282TF

this title order but have 10 up bill.

These are user-to-user forums, you're not talking to iTunes Support nor Apple on here. To try contacting iTunes Support to see if they will refund you (purchases are considered final) : http://reportaproblem.apple.com, or use the 'contact us' link at the bottom right of every page on here, or use https://www.apple.com/emea/support/itunes/contact.html

You've now changed your account's password and/or used Settings > General > Restrictions on the device to try and stop it happening again ?