Customer Service has disappeared

Webacall is a new entry in the field of VoIP.  It offers only pay-as-you-go plans, including "calling card" plans.  Although their per-minute pricing  is not the absolute best, their per-second billing compensates for that.  Right now, their customer service is their downfall.  My initial experience with them was quite positive.  More recently, however, I cannot access my account information and I can no longer place calls to cell phones (despite having money on account).  There is no customer service phone number, and they are not responding to my emails.  This is a deal-breaker as far as I am concerned, and although I previously would have recommended this company highly, it is now on my "stay away" list!