Tom’s Automotive Service

My car’s check engine sign was on last week so I took it to Tom’s auto services for a regular check. They were supposed to diagnose what was wrong with the engine and inform me of the issue. That was the only service I requested. However, after checking the engine, they turned off the check engine sign without my permission. I was not told until it was done. And it was too late. My car’s powertrain is still under warranty so I can take it to the dealer and get it fixed for free. However, without the check engine sign on, the dealer won’t fix it. It would cost $ 1000+ to fix it and my warranty will expire in a few months. They told me they could not fix it and ask me to take it to the dealer. BUT THEY TURNED OFF MY CHECK ENGINE LIGHT!!! How can I get it fixed without the light on??? It’s not their first day in business and they should know the consequences of what they did to my car.
They left me in a very risky situation and my engine could die any time after my warranty expires. I COULD HAVE HAD IT FIXED FOR FREE! Now I probably have to pay more than $ 1000 to fix it in the future.
What really makes me mad is their attitude toward resolving the issue. There were ABSOLUTELY NO CUSTOMER SERVICE. They were extremely rude when I tried to approach them about the issue a few days. My check engine sign was off and I wasn’t even sure if it’s safe to drive my car anymore. They wouldn’t admit that what they’ve done puts my car in a dangerous situation. And they also tried to sabotage my car in order to turn the check engine light on!!! WTF?! I stopped them immediately after I found out. The manager said ‘Since you are already unhappy with us, you won’t come back anyways” I said «Yea, I would never come back» Then he said «Then why are you still here?! Leave now!!» He completely drove me nuts!
I just want to warn everyone else who’s considering taking his/​her car to Tom’s. Don’t go there unless you want your car messed up!