cyberhub: 2Talk voip account will be hack is annoying and potentially costly.
It appears that you don't have port forwarding or devices with a public IP. This suggests that your PC may have a keylogger or another device on your internal network may of been compromised.
OP mentioned above a port forward (probably via uPNP) was set as the web interface was accessible from their public IP (or at least that's my interpretation of what they posted).