Vodafone India — unknown number misbehaviour

I got two missed call from number [protected]. When i call back the person asked you want to talk to amit. I said pardon then i think few more persons were sitting behind this man and told it means maaf kijiya. Then this man starts making fun of me maaf kijiye maaf kijiye and threatens me in abusive language teri to. Then i cut the phone. Then again he called me.