re: proof of employment
hi, you do not have to worry about your proof of employment at this point of time. After receiving the golden call, you have a long way to go before reaching this point.
Getting a reply through email will be a long or never ending wait. I tried emailing and didn't get a reply. Once you are being recruited, you will have a crew portal and questions posted in the portal will be replied almost immediately. so now, just relax!