We don't offer phone support for a number of reasons.
1/ Much easier to handle things the way things are (PerlDesk ticket system with emails piped through). This allows the support to deal with the issue then give a full report back giving step by step guidance or whatever info needed.
2/ Multiple staff can assist at the same time using web based support.
3/ We have support staff spread around the world in different timezones. A phone number to the office could be workable but not if the support on duty at the time isn't located in the office.
Having said this, some people just like to speak to a 'real person' rather than an email address so we're considering giving limited phone support (office hours). Its likely to be an 0870 number though to try and encourage people to use the web based methods (as things really do get done more efficiently this way).
EDIT: Just realiseed how old this topic is