Canaduct Duct Cleaning

Spent a lot of money to have my ducts cleaned by a well reviewed company but disappointed. They didn't seal other vents so we had clouds of dust while they blew out other registers, didn't clean the dryer vent from the outside as well as indicated they would & our furnace stopped working the night of the cleaning (our furnace is only 5 years old & maintained yearly), they did not resolve the issue as indicated the same night they would & we ended up fixing it on our own as we were unwilling to sleep at 15 degrees for more than one night. Communication was contradictory.