@Ashik, get in touch with MOI and ask ur company HR the reason for the ban. If they are serious about hiring u then they will take corrective actions. or else who knows they might be bluffing.
One more thing u can do is go to a renowned visa consultant in India adn ask them to inquire. they will take some money but u will know the exact issue. major consultant are jerry verghese, gheewala, prince, al sofi....