1. Have you checked your emails? Invoices are automatically sent out each month to the billing email address within the system, to update this please go to My Account > Account Details and update it from there
2. Have you checked the invoice section of the system? To do this, simply go to My Account > Invoices - this will display all of the invoices for the account

If you still haven't got your invoices, please raise a support ticket to us and we will look to provide you with the invoices required