Customer Statements to only show Unpaid Invoices

The customer statement function i find really poor in dear,

If you have a customer who places lots of order with you, we have several, 

We send our customer statement twice a week but you have to select a date range and when you run the report it shows you every invoice and every payment and its very time consuming for customers to pick out invoices that are due,

Their needs to be a simple customer statement to show only invoices that haven't been paid,

This should be simple feature and i can't believe it's not on the system