Gas heaters

I am complaining about the quality of your gas heaters. I find myself having to buy a new one every year because they die annually. This is wrong, gas heaters used to last for more than 1 year, now each winter the heater dies. I have 3 faulty heaters at my house which I really need to discuss with you and see if your suppliers cannot fix them. I cannot afford to buy a heater every winter.