Kpv Solutions — asking to pay money

Sir I am a student. I took the offer of 1500 form filling in 10 days. I can able to complete 1400 forms because of some reasons.Then they called me to pay 4900 to lock my ID I said OK but I didn't send any money. After 1 day I got the call and sir they are calling me and telling me that pay 30000 otherwise they will take legal action against me.Please help me out sir.