Dear Harikrishna,
First of all, check at your end that, whether the below mentioned are following or not...? (Considering your company come under Shops & Establishment act). if not pls. confirm.
1) As per S & E act.sec.17, The Working hours Spread over of the employees in commercial establishment shall not exceed eleven hours in any days.
2) As per S& E act. Sec. 63. When any employee is required to work overtime in excess of the limit of hours of work, he must be paid for such work at double the rate of his ordinary wages.
If you are following above rules & paying according to your contractor, then contractor is liable to pay to authority.
& if in case, contractor failure to pay any payment or due to any authority.
Then as per Contract Labour Act. 1970, All liability come on you as principle employer, in that case, you have to pay the all dues or payment to authority & same can be debit to concern contractor.
I hope you are clear now on this.
Regards,
Tushar Swar.