Employment Agreement on Rs 100 Non-Judicial Stamp Paper

Dear Concern, Recently a company approached me for Work from Home Part-Time employment opportunity. They sent me a Rs. 100 Non Judicial Stamp Paper online where all the clauses were mentioned, i.e, 1. my remuneration details and that they would pay me only if accuracy rate is minimum 90% 2. Then they also mentioned that they would deduct a reg. fees from my salary/ if I do not receive anything, I would be bound to pay that fees on my own 3. If they find that I have sent an incomplete work/ they detect 2 simultaneous logins from separate IP Addresses, then also I would have to compensate them. 4. I cannot do any other work until and unless they release me, even though my employment is a 4 day project contract At first I did not realize anything fishy. But after making the blunder of e-signing the doc, it seems that they are a fraudulent company and they will pay me nothing. I have a few questions: 1. Can they file a case against me an demand the compensation? 2. Can they refuse my resignation and hold my employment? N.B. I do not require any Release letter/ Exp certificate from them as I am currently employed with another organisation.