Leaving company before 1 year...

That depends on the contract that you signed with the company. 

You can resign by giving them the required notice.  I don't understand immediate?  you have to serve notice or forego salary in lieu thereof.

Lastly, I would suggest that you complain to MOL and document it before resigning.  In case your employer gives you trouble after.

Also I notice you posted this on Oman and Bahrain forums both - which country do you want advice for?  and don't post duplicate threads.

Thank you for reply..  I wrongly posted on Oman that's why I again posted in Bahrain....

Well.... I mean to ask if I give immediate resign like on 12 I resign and tell them that my last working day will be 15... then they can make trouble for me or black list me ???????