I want to dispute charges from last year that nobody got back to me about

Did you already request a refund from Apple by following the steps in this article?

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

If yes, you should have received an answer via email from Apple about that.

If not, contact them again and give them the case details.

Sorry, I did not mention, that clicking on this blue link will open an article, that will take you through all needed steps.

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

Last year February 11-19 my card was charge on in app purchases on a game that I didn't authorize

You must request the refund within the refund period (though within 90 days).

Refunds are not guaranteed. For more information, see the Terms & Conditions.

Click here for more support and assistance.

Any error message given?

It might also be, that you are trying to get a refund for content that has been downloaded over a year ago.