I emailed them just today and got a reply, same 
day.  Were you emailing about requesting a bid on 
an auction?  Or was it something else, like the 
status of your cels or shipping?  I've found that 
asking to place bids happens quickly.  Billing 
questions are more slow, only b/c that department 
isn't on a good server so they don't check their 
mail often.  Shipping type questions usually have 
to be answer by Keigo so that takes a day or 
more.  Overall Celga is quite responsive.  Maybe 
you should mail them again.