Getting hold of Adobe to deactivate CS6 on defunct PC/system board in order to activate on new one.

The old PC died.  Can't deactivate CS6 on that PC because it won't boot.  To be more specific, only the system board was replaced.  The programs are still installed, but they refuse to load now.  Need Adobe to do it.  How do I contact Adobe to do this?  They've had to do this for me before, but apparently, I was able to find a phone number for this last time.