unfortunately nothing my dear...
i was working with Rasgas and happened the same.even after they sent a request from their end, but could not turn anything poistive.its all upon the luck...we 5 applied together and only me got rejected.neither we can questian nore they will tell the reason..now me working in a private school.if once its rejected means, no need to quit the country.. you can apply another place and can again apply for the cid clearence for other jobs ...