Bulk Termination for no reason and nothing provided

I was working in an IT firm and recently on one Monday morning me and 30 people were terminated for no reason. The company is a Dubai based company and they want to stop the operation in India. They've provided no cash on the day of termination. There was a notice period of one month as per my letter of contract. But all of us were told to leave office the same day. The company did the same to other branch in another part of india and employees got nothing. They had to satisfy themselves with the left over PCs. Please note that we were not terminated for bad performance. Now the HR here says they will provide the overtime, gratuity, notice period pay after 1 month which is against law. Actually they are trying to pack up things from here and leave forever. I have contacted labour office but i think the HR came and bribed them. I heard some rumours so. Please help. I have put my blood and sweat for five years sincerely for this company. There's a meeting scheduled between terminated employees and HR in labour office soon but i think the result is almost fixed now itself to provide everything after one month. How can i proceed in this situation? Whom should i contact? I haven't received the Overtime pay where i like most developers worked all night on some days. Please help me make them realise we Indians are not fools. Jai Hind. Satyameva Jayate.