Scam!

We moved in this house in 2011 and we had a 9-year old furnace. We decided to call Bosco and do a check up. The technician apparently found cracks in the heat exchanger which is dangerous for our health due to the carbon monoxide that is released. He redtagged the furnace and shut it off leaving us and our 7-month old son in the cold. I asked for a carbon monoxide reading, or another test to prove that this was necessary but he said that the visual check was enough. Of course, there was no way for me to see the cracks but I had to believe this guy! Of course, they wanted to sell a new furnace but we went to somebody else and did it. They couldn't see any cracks in the heat exchanger and neither could the other two technicians we paid to do that. We called the manager at Bosco and he refused to deal with this, not being an "urgent matter". He agreed to come and check but didn't show up. Therefore, we wrote to the president of the company and eventually he sent two technicians to show us the cracks. Apparently, we are blind, because they were showing us cracks where we couldn't see anything, not even a scratch... The license in his pocket gave him the right to say that something is there where there is obviously nothing! DON'T GO TO THIS COMPANY EVER! IT'S JUST A SCAM.