How do I fix unexpected charges issue on my Apple Card?

Someone with the same doubts? How is it possible that my account has increased more than $800 with three transactions of less than $70? I have made an excel with the expenses and payments that I have made and I have paid $2000 extra and I still owe $1000, someone to explain it to me.

[Re-Titled by Moderator]

Original Title: Apple credit card