Eccotemp LLC Eccotemp Water Heater FVI-12-NG "Exploded" and Company dont care!! Summerville South Carolina

I purchased a remanufactured FVI-12-NG water heater (These guys reportedly fixed it after it  had failed in another home?) from E-Bay in September of 2015. I had this same type of water heater FVI-12-NG in a guest house for about four (4) years prior to a freeze related incident making the unit unusable. I didn’t install the water right away, (about 60 days) because we were remodeling the guest house. After proper installation, the unit actually exploded on the wall after the first time it was used!! The water heater then began to leak water and wouldn't work properly.  I contacted ECCOTEMP Tech “Mike” and he asked me to take the water heater apart ( I was suspicious of a Company that would want me to take  apart a exploded water heater?  You would think that they would want to inspect it to find out why it exploded??? ) and take photos of the internal area of the water heater for a warrantee return.  After I did that, no one from Eccotemp would call me back.   Eccotemp refused to have this item returned, and Eccotemp refused to stand behind this dangerous water heater that actually exploded! (They simply don’t care!) How can Eccotemp not care or stand behind a dangerous water heater that they sold, and that exploded on the first time it was used?? This type of item could blow a home up or hurt or even kill people?  I wonder how Eccotemp can stay in business when they sell a product that explodes and they don't even want to investigate it?? Shame on Eccotemp and please dont buy anything from them.  They are truly a RIP-OFF Company!!