I know dealers are more expensive but this is eith...

I know dealers are more expensive but this is either incompetence or I was going to be taken for a ride!
I paid for an engine light to be analyzed. 500+ to fix it. Was told I could use the 75ish dollars I paid to be credited to fixing the car. I then brought it to a small auto shop. They analyzed it and fixed it for 45.00. Was a bad seal on gas cap and a loose fuse.