First of all determine the company is registered as/covered by which Act:Punjab Shops and Commercial Establishments Act (Chandigarh/Punjab/Haryana follow it) /Factory Act.......................and then look into the provisions of the Act..............
Download the evidence of work hours/day (audio/visual/witnessed/minuted/emails/SMS/work reprost) and build proof.
It is undoubetdly 8hrs/day=48hrs/week..................................beyond which OT is applicable.
There should be a break after each 5hours.
Weekly off and other holidays,national holidays are well defined.
Leave and eligibility is well defined.Sick leave should not be denied.......................amx. company can ask for advise of doctor........................that you should always keep in original.
There is a cap of max. working hours/day.......................OT/day then per Quarter/half year, per year................................beyond which OT can not be asked for .
OT is @ double the wages.
Demand and download attendance record, salary slips of all months and if OT is not included demand it in writing.
The company is duty bound to submit work hours/attendance/OT/leave record as per various registers prescribed under the Acts.......................
You can approach employee's/Trade unions and they may opine to approach:
Inspector appointed under : Punjab Shops and establishments Act (if your office is registered or covered by the Act and you are covered by the def. of 'Employee' as in the Act) and call the person shown as Manager/representative of management s in registration Certificate. This Act is so employee friendly.............................and may not discrimnate between 'Workman' and 'Non Workman'.
Or ALC-Central as the case may be in your case.
Inspector appointed under :Payment of Wages Act if your wages as per def. of wages in the Act is upto Rs.18000/pm.This Act does not discrimnate between 'Workman' and 'Non Workman'.
Higher officials of Dept. of laabor (state/central as applicable in your case)