Stress and anxiety while waiting for PhD viva
Unfortunately, there isn't all that much you can do except to have the people responsible for ensuring reviews are turned in contact the examiners and get them to turn in their reviews of the thesis. 

Complaining to the examiners directly will do little good, and your thesis supervisor may or may not have the clout to get your examiners to turn in their reviews.

However, you should be applying for Ph.D.-appropriate jobs right now, so that you're able to move into something once the oral examination is finished. Supervisors of jobs normally taken by Ph.D. recipients will typically recognize that there might be some delays in getting the degree, but will still hire people close to finishing their degree.