My boss is asking me back my employee provident fund!!!

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So today when I go outside to buy some grocries, unfortunately to me , my previous boss is stopping my car and said he recognise me as one of the employee for his company 20 years ago. Although I was scared I pull out my strength to talk to hime peacefully at this time of crisis. So he ask me back my employee provident fund that he give me for some time ago. He said I made he very angry and couldnot sleep at night thinking about this money. I said I already resign but he said he will sue me. I want this problem to end peacefully but he said when I was his workers he said I did not perform well enough and make him lost the money of A4 papers, electricity, and others. Isaid how can i do? He said return my money and there is no problem. How to go about this problem? I really need help.