Dear Punam,
If the Labour Inspector gave notice for HR non-compliance, then why did HR not reply? Why was he/she sitting on that? Moreover, why did the senior management not follow up with HR to correct the anomalies and provide a reply? Now, what you have received from the court is "summons" and not "notice". The cause of these summons is the non-communication from your company.
Non-communication, or rather nonchalance, has aggravated the problem. This speaks of your management's lethargic attitude. Now, at this stage, the "occupier" of the company needs to appear in person on the day of the hearing. For this, you need to hire a lawyer as well. If possible, work on each point of objection and submit the reply to the court. If it is not possible to submit a proper reply, then ask for a little more time from the court.
The Indian judiciary moves at the slowest pace in the world. There is now a possibility of the case being dragged on and on, and for each hearing, you will need to pay the lawyer's charges. It appears that your company is too rich to get into avoidable litigation.
Thanks,
Dinesh Divekar