Shipton's Heating & Cooling Ltd

Absolutely terrible experience with this company. I had an emergency repair done on Saturday Oct. 18th 2015 in the afternoon by a tech named Mark. We had no heat and we have a 16 month old baby girl at home. My parents and family were over and were enjoying our day with our baby girl. As it turns out the problem was with a faulty pressure switch but I really remain skeptical because I was told that they rarely go bad, I was watching the tech do his trouble shooting looking for blocked hoses ect. then he slapped a whopper on me and told me that the switch was bad and retails for $340 showing me some app on his smart-phone! I was desperate because I don't want my baby girl to get sick from cold. Suffice-it-to-say I found the exact same switch brand new on ebay for $37.00 and one locally for $52! This is almost a 600% mark-up on the part! By the way he installed a generic pressure switch and had to order the part and said he will come back early in the week to install it. I will pay the $98 diagnostic fee but I will purchase the pressure switch myself and install it. I have many years of experience in electronics but no experience in HVAC but it's a simple repair so I can do it myself.