Gratuity case and count blast with 420

I resigned from a private company (ABC) after serving 13 years in May 2021 and registered a case for a gratuity claim in the labor court, which is still ongoing. They didn't show up for the dates the majority of the time. On16th August 22nd), they came after 4 pm & threatened me too, threatening me with 420 cases of data theft & misuse or settling the matter in Rs. 40000/-. want to know if they could sue me in a 420 case. ( after my resignation, I promised to serve for 1 month. have the company hard disc to work. & simultaneously doing my side business, that supplies packing materials to the company I was last working with and gives them a credit limit of 60-90 days. Payment pending of 57000/- for good supplied (still pending). When I asked the company to clear the balance payment, they alleged me for keeping the company hard disc unintentionally for misuse,monetary gain.) Blame 1): running my own business simultaneously during my employment with a company, which is clearly cheating.