Crop Technology — legal threatening

Sir
I am from south india. I was signed one job contract with crop technology. And they are provide one user name and password. But its not valid. They are contacting me before 2 days and they will provide another user id and password. Next day they will send one notice. They are asking 15500 rupees. Now what i do. The company is working under you or not. They are provide work details fully wrong. Please help me sir.