Climatisation Fortier & Freres

Call them for a leak in my system ask before if it's that do they can view it the tech told me yes but cause the age of my system he think that the problem is something else. He come and made e cleaning and lot of verification else than looking for a leak like I asked before find a cap missing and refill the system?? told him that according me it was not the problem, he told me that anyway the job is warranty for 90 days. 2 weeks after same problem, same tech after checking told me that was an only adjustment AND refill again the freon in the system?? 2 weeks after same problem. This time they told me that the problem is probably a leak and that will cost me 800$ to check it and more depending of the broken parts. I told them that the could told me that first when when I phoned for a leak! From the manager the answer: it's 800$ and we won't return to your house, no warranty anymore.