The client makes fake promises to come back with new project

Dear Sir, I had signed with One KPO project in 2019 and it was not taken forward by client nor didnot refund the amounts by saying different silly reasons. Then he come with new project with fake commitments after a year by saying he could recover all the losses with new project by colleberating with my company. He asked me to invest money. Once I paid the investment money he showed again his true colors. Both projects has MoU's. He recently offered me a project and sent his trainer to train our team. He gave us a sample work which couldnt worked more than 3 days. then he keeps saying foolish reasons and not starting the project rather he is shouting at me that my team is not capable. He is just playing dirty mind games with me. I didn’t think we were a good fit for each other anymore. I am looking for my money back because of his false commitments two times i was invested for office infrasture with additional huge amounts among from the project investments. He is a cheater playing with me and my situations since 3 years. I just want to end this toxic business relationship with him. Please kindly advise.