I am an employee of a company for the past six years. I have resigned from my company and served the notice period. However, my company head does not want me to leave and delays every process, including the work handover. Now that the notice period is completed, he is still telling me that I didn't complete the project and didn't do a proper handover. At the same time, the company and the legal team threatened to file a case against me and demand all the money given to me because it is investors' money. They claim that the projects I have done are not worthy enough and acceptable to them. They are also blaming the founder/CEO for this. I don't know whether this is a ploy against me to retain me. Please advise on under what circumstances the company can file this kind of case against an employee.