what is my bill to apple about

As you are being charged the same amount monthly, it sounds like you could have signed up for a subscription. Please be advised that free trials automatically continue into a paid subscription unless cancelled.

You can view and cancel your subscription following the steps at How to cancel a subscription from Apple – Apple Support

You could potentially try and claim a refund by contacting Apple's Form > Request a refund for apps or content that you bought from Apple – Apple Support however this isn't guaranteed and it is up to whether Apple allow the refund or not.

This is a user to user forum and no one here works for Apple nor can we look at your account. Use the link above to figure it out on your own. You're right, it doesn't take a rocket scientist.