I had one client who was an old fashioned software developer, he didn't like in my code the OOP, he was unable to understand it so he didn't want to pay me, he

I had one client who was an old fashioned software developer, he didn't like in my code the OOP, he was unable to understand it so he didn't want to pay me, he was oversea so the getting those money for the project was more expensive than actually the money.