Had a very poor service experience at Schomp BMW i...

Had a very poor service experience at Schomp BMW in highlands ranch .I went there for my 2018 BMW 3 series with the check engine light on due to an error code on the ambient temperature sensor. When I checked in for my appointment my service advisor was trying to convince me to postpone my appointment and come back again after 1 week, when I refused to do so. I was told by her it would take them 6 hrs to read the error code and find why the check engine light is on (I was like are you kidding me) and I'll have to keep waiting for 6hrs. But I was adamant that I wanted my car looked at that day itself since I had made this appointment a few days in advance and did not just walk in. I found her behavior to be kind of rude and condescending.

Then after exactly 20 mins or so my service advisor came up to me and told me that the check engine light is on due to rodent damage on the wiring connected to the ambient temp sensor. And since it was rodent damage it would not be covered under warranty and they would charge me 450$ to replace the wiring when the parts themselves cost only about 35$ and it takes about 30mins of labor.

So, I believed them when they told me rodent damage and due to their ridiculous cost to change the wiring I decided to not get it fixed through Schomp and just bought the parts from them.
I took my car to an independent auto mechanic and he looked at it and showed me the wiring which showed absolutely no evidence of any rodent damage infact it looked like it was cut and probably got pinched somehow.

My total service experience at schomp was terrible. Not only was I made to feel like I was not welcome there, but also I was lied to about the wiring being damaged due to rodents which I later found out was BS.
Their intention was not to fix my car under warranty but to try to rob me off 450$ for a simple wiring change which takes less than 30 mins.
I would never go to service to this place again or buy anything from them in future. I have owned a lot of premium cars in my life but never been to such a dealership before which is trying to loot people.
I wouldn't mind driving an extra 10 miles to a better dealership if it means I get better service.
I would have given 0 stars if that was a possibility.
They don't care about you once they sell you the car.