When I originally bought the trailer they were nice I am 71 and I am literally freezing this is the first year we have tried to live in the trailer its only been on one camping trip. I called service they put me off I call sales no response. I have done over $1000 on my heater for repairs and I cant get it to warm up they tell me its the way the manufacture made the heater. I don't know what to do I'm freezing. Who will help me.? Show less