How do I get a refund for unintended Apple TV subscription charges?

can you tell me how can I GET A REFUND IF A TRIED TO GET PIKACHU DETECTIVE WITH THEIR FREE SUBSCRIPTION 7 DAYS AND THEY JUST CHARGED ME 9.99 INSTEAD OF WAITING THE 7 DAYS FREE TRIAL AND ALSO THEY DONT HAVE PIKACHU FOR FREE THEY ALSO TRY TO CHARGE YOU 3.99 PLUS, NO WAY.....

[Re-Titled by Moderator]

Original Title: APPLE TV SUBSCRIPTION