Pwm — harshament and forcing for money

Address:

431514

I few days before i got call from unkown no asking for online typing job they ask me about my id proof and they did online agreement but when i saw there work i send mail to them and told that i cant do this job of filling 900 form in 9 day but there was no reply from their side and now today they sent me one notice from lawyer dilip jain and asking me for 5000 rupeeswhat should i do please help me