What a joke... They should have migrated to live chat support long ago. Last time I had a problem with my webhosting, I had someone on live chat within a minute and the ticket was created, resolved, and closed within an hour and a half and QA/QC'd within 6 hours.
Its amazing what happens if the industry dictates that 99.9% uptime is regarded as standard.
I would have thought that email service levels would be assessed on the availability of service from the email hosting service.
In this respect, speaking from personal observations, both iBurst and Telkomsa.net both left me without email service recently.
It is inconceivable that these organisations do not have mirrored servers to service their clients. Real mickey-mouse stuff that when the pop3 or smtp servers go down, the clients are bereft of service. (I was going to say that the clients are stuffed, but this is not polite).