Furnace cleaning and duct cleaning

I had my furnace and ducts cleaned yesterday. I've been having issues with asthma so I thought I should start cleaning everything I can. The dude said he sucked up about 20 lbs worth of sand, dirt and toys out of the cold air returns. Of course, nothing goes smoothly. It took them 2 hours to get the furnace up and running again. The pilot light wouldn't stay lit. The previous duct cleaning company cleaned the vents in 1993 and stupidly cut holes in the asbestos covered air ducts in the basement so when it was cleaned this time my basement was coated with a thick layer of dust/dirt. The rest of my house was extremely dusty/dirty today too so I spent the morning swiftering and mopping the floors. Not good for asthma. I called the furnace cleaning company today to tell them. They offered to send someone over to clean but I've already done most of it so they're refunding me $30. Big deal. I suppose I could have asked for more.