Best Bathroom Exhaust Duct Cleaning in Miami FL

My AC was malfunctioning I found national air and heat in Miami's telephone number online and called them. They came over and charged me a $100 just for the visit off the bat. They then  tried to upsell me to a $12000 unit!! I wrote them a $100 check and declined any further service.. Later I found an honest AC repair person repair person who fixed the problem for only a $150 did not charge me for the visit. I do not recommend these people in any way shape or form.