Passport held by company

1. How many years you are working in the company?
2. After completion of 6 months working, if you need annual leave it's not accepted by the company.
3. You can apply for Emergency leave, depending on the subject.
4.  If you have any other issues pls contact your embassy.

As per my contract I am eligible for annual leave so why not after completing 6 months I am not eligible ?

Read your contract carefully. As for me I'm only allowed to take leave after 2 yrs of completion and after I complete that and if I will renew the contract I'm allowed to take leave yearly. This is what the contract said. That is why before signing it you should consider it first and discuss all things to the employer. Now if it's emergency they allow  only 15 days leave but they will not pay the ticket and they will not give you salary too. They cannot hold your passport. If they did not give then you can complain to your embassy and in the ministry of labor. Employers take their employees passport coz some people just leave suddenly without the employers knowledge about it. The employer lose money coz they paid for visa and work permit. Most people run away so they just want to make sure. But still it's illegal.