We are not a part of Amazon and we do not get your money from Amazon for books you sold.
The money is sent directly to you from Amazon. When you signed up for KDP, one part of the processes was the getting paid part. You filled out your banking info, on how to get paid. Amazon then sends payment to you when it is due, based on what you entered. If you are unsure of what you filled out, please login to your KDP dashboard, click "your account" and it shows under the section "getting paid".
Also, please see this article on when Amazon pays you for books sold.
If you do direct deposit, there is no minimum required to be paid, when due to be paid. If by wire or cheque then there is some minimums. Please see this article about payments on KDP. For minimums before they pay you, please see this article.
Login to your KDP Dashboard by going here: KDP Dashboard.