SIPSTATION not working at all

Anyone else has issue with outbound calls with Sipstation ? For the past three weeks all my calls connect and disconnect after 2 sec ? I ran a wireshark capture on my PBX and saw that there is no RTP coming from SIPSTATION Media server or Gateway IP address to my phone. That sounds very much like a SBC or Firewall issue. I sent numerous email to tech support. They aknowledge the issue is on their side but not change so far. I haven’t been able to make call with my asterisk.

The problem is that it has being going on for three weeks now. Anyone can suggest me the name of another trunk provider. I am thinking about switching to Broadsoft. Anyone has experience with them ?