Decentralized exchange can NOT be closed down through any means other than shutting down internet itself.

Network problems are caused by fault in recent server code updates. This is an inherent risk in decentralized networks, which every crypto suffers from time to time. Because of the distributed nature of the code running around the world it takes time to clear them out. HEAT will work fine again in some days, with any temporary discrepancies fixed automatically, or later on with our help in adjusting code in future releases.