I do know what these charges are for

Start here: If you see 'apple.com/bill' on your billing statement - Apple Support

Karen2456 Said:

"I have charges that I did not authorize."

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Modify your Credentials:

For Security & Privacy purposes, consider modifying your credentials. One thing to consider modifying is using a new eMail Address for your Apple ID.

What to Modify:

• 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