Threatening

Three persons XYZ plan to do a business ,so the business registered as a Sole proprietorship in the Name of X , Each invested Rs.2lakhs to run a business there is no legal documents for the Y & Z investments, later on Z plan to leave a company and Ask the investment amount immediately but X & Y refused to give and ask to take maintanence,office expenses mutually for Z's business period.... After business met huge loss and debt over their investment,so Y cunningly releave the business immediately and office was closed by X after the releave of Y ... One year later Y and Z plan to torched X to repay the amount which given by them as Debt instead of investment , X refused to give the amount ask them to we have to go mutually and loss amount had to share equally but Y and Z said that they are not partners only they give money as debt for X business as well as they stated that they didn't sign any legal documents as a partner Now How can X get Relief....? X doesn't have any legal documents of Partnership Y & Z also doesn't have any proof for amount given as debt Now Y and Z threatening X as, we going to file a cheating ,Forgery case against you ,if you refuse to payback the debts.... Actually is that X has to give the amount....? How X can approach legally