What legal actions should I take against my ex business partner?
I own an e-commerce company which is solely registered under my name. I had an oral business partnership agreement with a partner, which was my former boss. We became close friends and he decided he wanted to willingly help me with my business and wanted to own 50%. No contract or agreement was ever signed. About 2 years passed and I started to notice his change in attitude and loyalty. I came across many big lies he had told me about several business opportunities. He also lied and made up about 4 different people who I originally interacted with only via email, they were supposedly his "assistants". Enough is enough and I had to let my ex-business partner go and he is sending me invoices through his "assistants" email threatening me with invoices that I need to pay him thousands of dollars back within 10 days. Mind you, the invoices are merchandise we bought from vendors. He copied and pasted the items on an invoice he created with his IT business name and added any price on it. He says If I don't pay he will send it to collections. He also says he filled out a K1 form that he filed under my business with his investments, not sure if this is even legal since a K1 form is only for partnership companies with two or more registered owners. He even stole my domain and used it to make another website with my brand logo and name. He also has made several Instagram accounts using my brand name. I feel like he’s trying to steal the company. Not sure what to do, any help?