Tint Doctor and Auto

I took my Nissan Altima their after getting a preliminary diagnostic done at Nissan before buying it. Nissan said replace the timing chain. So i order the parts and went to tint doctor and auto. They quoted me amazingly lower then any other place. Then! After maintenance is done and I pay them 800, followed by them trying to sell me new brakes. I find out i need a new engine because my 3^rd cylinder does not have pressure. So they can look at my brakes and try and sell me new ones. But not do a diagnostics on the car before working on it. End of the story I’m out 800 and the money for the car. They said i only asked for a change of parts that Nisan recommended and shoved the blame on me.
Just wanted to double tap. Don’t take our car here for auto service. I’m sure they are great and window tinting but they don’t work on your car with you in mind. Just a paycheck.