Unknown charge of $16.23

Hi! I'm Luis, a fellow Xbox Gamer . Thanks for reaching us out here.

Have you checked your order history to see what these charges are for?

https://account.microsoft.com/billing/orders

If no charges appear then that means they are coming from another account. If that is the case and you have not shared your card details with someone close to you.

Then you should reach out to your financial entity to dispute and block the charges

Did you use a trial for some of the applications like Zune , Lovefilm, Netflix etc because i noticed something sneaky about them , they are easy to start the trial but to once it runs out they just start charging you if you dont cancel it and its not as
easy to cancel as it is to start, i had to go as far as calling xbox on the phone to cancel all my trials which is wrong imo , you should be abel to do this on your xbox , but yeah maybe thats the problem ?

The 1-year family plan is a yearly charge, all other may be a monthly charge, not entirely sure since i've only ever used the family plan aside from getting pre-paid cards.

For this issue you would need to contact xbox support:
http://support.xbox.com/contact-us

Hello, first it's a pleasure to be able to help you today.

My name is welcome to the community.

Hello Camest, the best way to get some help with your question would be by taking into account Xbox support via chat, when entering ask to be transferred to the specialized department where they can check your purchases by your card.

https://support.xbox.com/en-us/contact-us