For both Sales and Support Coprocess is available 20 hours a day covering Asia, Europe and North America.
Now, in the US, you can speak to one of the team by calling +1 888 279 2466. Hours of business are 9am - 5pm Eastern.
The Coprocess system is available and monitored 24x7 and has a guaranteed and delivered uptime of 99.9% so technical problems are unlikely, but it is good to know there is a support person available.