To view your invoices
Navigate to the home page and click on the Invoices icon at the bottom of the screen as highlighted below.
In the Invoices tab you can view your invoices, to view open invoices make sure to clock on the Open option at the top of the screen. To view paid invoices click on Closed on the top right.
To view past payments and transactions
Navigate to the home page and click on the Transactions icon at the bottom of the screen as highlighted below.
In this page you can view all payments that you have made, or refunds and credits that have been issued to you. Refunds and credits will be in green, while payments will be in red.