I am being charged 10.59 per month for what I have no idea. Has someone hacked my account?

My guess is that you inadvertently subscribed to something from within an app. That's now many "free" apps actually make their money. The charge and explanation should be in your purchase history in your iTunes Store account; check that.

To unsubscribe if you did indeed accidentally subscribe to something, see:

http://support.apple.com/kb/HT4098

Regards.

Had the same situation. Followed what you said, it was the Apple Music subscription. Thanks for the advice!