That is correct, we do not currently provide telephone support.
We are evaluating a way to do this cost effectively, however with tech support in three different time zones, the single phone number contact is not particularly cost effective. If we sold domains for $35, we could provide worldwide 800 number coverage, however at $15, we have decided not to do so at this time.
You can always call the number in our whois information if believe you need to speak with someone, however your chances of reaching someone in real time there are dependant on which time zone you are in.
If you use the support desk as we suggest, or the phpLiveSupport link, you'll get the person who is on-call for support at that time, and they will help you.
Our average response time for helpdesk calls is 16 minutes - this according to the trending software we run on calls. We have outlying calls at 120 minutes, however we are working on filling those support gaps by adding tech support in Europe to pick up the hours we currently have no coverage today.