Sharp Info Services — Data entry

I have applied for work from home job in quickr jobs. I have received a call from the firm named sharp info serevices they said we have data entry job you have to enter 800 sentences online in english and they said I have to submit with in 6 days otherwise to extend it due date 1000 per day I said okay and I have to pay 4200 if not entered correct 720 sentences, I said okay, they said the sentences will be in English sentences they showed the sample work it is also in English only so I said I do the work so to continue with the work for that they asked My Voter ID card as part of employment they said it is company rule and they send a agreement it is a formality so I signed it and send them back they have never send their part of signed agreement to me and they send the login credentials to my Mail ID and I started the work and while doing work the letters are in English but they are not English words even though with out most hard work I completed the work and submitted to them with the time period they said but now they are saying you have to pay 4200 you breached the agreement and they are saying we will file a complaint against you in the court otherwise you have not pay 4200 to us and blackmailing we will take over your cibil score will contact banks and loan officers of all banks and make you will not surely get any loan in future if not paid and they are saying we have phone call records and agreement we will send you legal notice with your father /mother name.