welcome to standard operating VOIPO features. Pick one or more of the following daily or more often if you are lucky...
1. ring once go to voicemail.
2. don't dial out
3. in middle of call, drop
4. echo.

Have had them adjust my routing for the # in question (seems scary they do this each time and it doesn't stick)
Have had them work on call quality, proxy, helped then was varied.
Have had them adjust firewall settings (twice).
Have had to use cell phone more times than I can remember over the past 3 months (I"m recent to VOIPO).

VOIPO is just barely better than magic jack. If I can't get fixed this week, may have to make it a backup line to a real VOIP provider...