[GNC] how to use information of vendor and customer for report as a same person

[Mr Rezvany]

Hi, dear.
I use gnucash and enjoy it.
I have a problem.
I sell to one of my customers and they do not pay.
After a while the same person buys me another thing and I want to pay.
I want to make payment considering the debt of the same customer .

I want to have a report from one person, but I have to get a report
from both sellers and customers separately.

Please help me to solve this problem.

best regards.