I need replacement parts

When I started up our oil furnace toward the end of October, I knew something was wrong with it.  The moderate air coming from the vents had an odor similar burnt hair and was rather dusty. I noticed an immediate difference in the cleaning requirements of our home.  It seemed as if I was consistently vacuuming or dusting. My husband as well as the kids complained of headaches, itchy eyes, sore throat, along with frequent sneezing. I hoped that once the oil furnace ran for awhile, it would sort itself out.  I made sure to clean the vents and replace the air filter, but this didn’t really help. Gradually the oil furnace began to make a bizarre grinding noise every time it cycled on. Those cycles lasted what felt like forever, yet the apartment felt a little too chilly.  I bumped up the temperature multiple times, then was shocked at the cost of our yearly energy bill. I finally called a local Heating plus Air Conditioning supplier, but with a sudden snap of freezing weather, it was hard to get an appointment. Apparently, all the people in the surrounding areas were having complications with their heating equipment.  The closest appointment was many days away, our oil furnace didn’t last that long. It quit in the middle of the evening, over the weekend, when the outside temperature was down to 12 degrees. I ended up paying extra for overtime service, all for the supplier to inform me the oil furnace wasn’t worth fixing. He said that the buildup of dust as well as debris within the inner workings had caused a tremendous amount of wear and tear.  The cost of the many replacements parts would have added up to a greater expense than a modern oil furnace.