Hello Susanta,
I am surprised why did your company do that, please give me answer of some of question.
* Have your establishment have PF & ESI code?
* If yes than EPFO & ESI have bodies issued any notice to organization?
* What was the reply of your organization for notice?
* If your organization has not received the notice than inform the concern authorities.
* From last three years no person has claimed any PF claim?
* From last three years no person has availed any benefits of ESIC ?
As per my opinion your organization does not have PF & ESI code.
Regards,
Ashish