Exchanges look for professionals and they have to pay them based on their set of skills. It's rather difficult to employ a large enough support department with thousands of emails coming in on a daily basis.
I'm using a smaller local exchanging service for almost a year now intensively, and they are very swift with their support. Even account verification was completed within 1 business day. It would take several days with any of the current exchanges.
I completely understand the expectation of the the exchange level and how it should be! They can also train the people to work like professional equal IT companies. All things here in business need experience or training. So we cannot do anything for that.
May be, let him wait, if still he unable to reach the concerns then we can decide it really they have the team for it or something.