Assalamu alikum sir,Iam working in private company...

You can submit a complaint to the Labor Office, as according to the Labor Law, the worker may not actually be employed for more than eight hours per day, unless agreed otherwise, provided that the actual working hours of the worker do not exceed ten hours per day.
Work hours and rest periods must be organized so that the period from the beginning of working hours to their end does not exceed eleven hours per day.
This excludes workers who practice intermittent work by nature, provided that the period of their presence does not exceed twelve hours per day.
The employer may employ the worker for additional working hours if the working conditions so require.
The worker shall be granted a wage for each additional hour equal to the wage he is entitled to plus at least 25% for the daytime working hours and 50% for the nightly working hours.