Avis He does not like to pay his invoices

I worked as developer for NGU and it was the worst company to work with that I have ever seen. He pays good rates, but he doesn't pay the last invoices. He used the same strategy with other employees , I have talked with other providers that worked for him, and all of us were not paid at the end of the projects. NGU, if you see this message, please pay me the invoices, I have the records of every minute that I worked for you and you didn't pay. Please pay me the money. I rescued the Pharmaceutical project for you in 2015, it's time to pay. thanks.