How can I get a refund for unauthorized charges?

Again, this is a,user to user forum, no one in here can help you. You said you went there, went where? Did what several times?

Your bank is not responsible for refunding your purchases and if Apple denied your refund, then there is nothing else you can do.

Hello~ Where are you seeing these charges? If on your device then click on below…

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

If you are seeing them only on banking/credit card contact them immediately to ensure your account information is not in the hands of a fraudulent user.

~Katana-San~

If Apple denied your refund there's not much you can do. The only way is through your card issuer/ bank.

Katana-San has given you a link to use to request your money back. You need to follow those instructions.

This is a user to user forum, no one in here can help you. Repeating your issue over and over isn't going to help.

Hello again ~ You never answered my questions about where you are seeing these charges. If they were made from your device and Apple refused your refund that is all you can do as refunds are not guaranteed. Where are you seeing these charges??

~Katana-San~