I need to cancel all my recent purchases

Try this: Request a refund for apps or content that you bought from Apple - Apple Support

Wolowelo Said:

"I need to cancel all my recent purchases: The purchase was made without my permission by my 12 yrs old son"

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Secure you Account.

A. Important: Don't share you credentials with anyone whomsoever -- family member or not. Once someone knows your credentials, you've become a target for hacking, and this is a pure example of how and why not to share them. So, I'd say it is best to start with creating a new password. Sign out of all accounts prior to signing in with the new password. From there, you may want to open a new eMail account for use for your Apple ID (any nothing but). Just keep this all to yourself.

B. Modify your Credentials:

Having been stollen, someone lily has your credentials. So, by all means, modifying them.

• Modify: your login credentials (Using Both a New eMail and a New Password for each and all sites)
• Associate: a different method of payment to your account
• Enable: Two-Factor Authentication for Apple ID and for all other accounts that have such an applicable option