I received an email that someone has hacked my apple account and charged $100

Apple doesn't send emails that your "2 factor was authorized."

Again, you are being subjected to a phishing scam.

This is a user-ro-user support forum. If you still don't believe my replies, the following has information about how to contact Apple when your account has been compromised: If you think your Apple ID has been compromised - Apple Support

That is likely a phishing email. Apple doesn't send emails notifying you that you have been hacked. See the following:

Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support

and

Identify legitimate emails from the App Store or iTunes Store - Apple Support

I want to refund from my 100 $ someone hacked my account money

As FixFifth said, those mails are usually phishing.

If you use a credit card for payment, check with your bank to ensure the money was actually debited with your card.

For a refund, you will need to contact Apple Support (https://support.apple.com/en-gb)