Reliance Home Comfort

I lease a hot water heater from Reliance for my townhouse- in addition to providing hot water, it attaches to a heat exchanger to heat my small home. When I attempted to turn the heat on for my first winter in this place, I realized it was broken and called a Heating/AC company, who identified that the heat exchanger had been damaged by the water heater, as it lacked a working pressure gauge. The repairs cost me over a thousand dollars, and the heating guy told me to get Reliance to replace the defective tank. Reliance sent a contractor to fix the pressure gauge on the water heater tank, but would not replace the tank. Now, several weeks later, the tank has started leaking and has caused extensive damage to the top floor of my townhouse. I had to drain the tank, shut off the gas and the water, and find somewhere else to sleep for the night. Reliance is apparently sending someone tomorrow but they tell me they are not responsible for any damage. I am going to have to pull out the soaked carpets and wood from the floor, and hope that all that water damage hasnt also given me an expensive mould problem- this water heater has been a nightmare for me with no end in sight.