How to file legal notice

I have collected 50 lakhs from 5 people by falsely claiming that i am running computer business and offering them profit of 10,000 every month for investment of 50,000 and profit of 15,000 every month for investment of 35,000. After 1 year, i have given them their invested money in the form of profit monthly and run out of money and i told them the truth that i never run any business nd only given them their money back in the form of profit. Out of 50 lakhs investment, i have given them 44 lakhs in the form of profit. Now the are asking full invetment amount but i am having no money. I personally spent 6 lakhs myself from tht invested 50 lakhs only. so please help me how to deal with this. i have also given them cheque of 25 lakhs total to all 5 persons. I stopped that cheque payment but they are threatening me of bouncing it again and taking legal action. please help me.

I am in the business of garments, and I have been supplying uniforms to a reputed hotel. In the last order executed, there were some unintended quality issues, that we readily agreed to service them, but after 1 month the customer declined to make the payment. Amount pending from him is Rs.70,000/- approx. I do not have any cheques from him. But all the business was done in proper manner, with GST invoices issued and I already paid the GST on the aforesaid amount. Can anyone guide me here?

Namaste sir,I had filed cheque bounce case. the respondent has died during the case trial is pending.before the death of respondent has made a (property) gift deed to his son's.& His son s have already sold the property to thirt party.can I make his son's as party in the case & bring court attachment to this property ?plz let me know at the earliest thanking you.