I just wanna what should I do

Respected all lawyers.. As I m a businesman and don't know much about law, I m facing some prob now. The matter is someone lose 5 lac rupee in mcx (dibba trading and cricket match betting ) with me. After that I asked him for money and he didn't respond my calls and msgs on whatsapp. .so after so many tries I just abused him over whatsapp. Now he is threatening me that he will do a case against me. I need advice that what should I do now . I have all msgs..I just abused him simply