Oil change service near Sunnyvale, TX

My car over heated so my husband took it at this place which was a bad move because the mechanic named Adam called us and said that my radiator was bad he quoted about 650 dollars to fix it i immediately called back saying the price was too high and told them not to fix it and that i would pay 75 dollars for the diagnostic fees I think I ticked him off by saying that cause he said he was going to charge me 325 dollars for the 5 minutes of nothing he did to my car, so I rush to the store and confront him saying why was he charging me 325 for 5 minutes , he looked all nervous and told me he was going to take the 125 dollar off and would charge me the standard price which was 200 dollars, I was really mad so i paid the money and stormed off. I never write reviews , but yes I do read them it helps me a lot so I am just writing this so you guys can think before hand do some research call other places and then decide where you want to take your car to get it fixed, because i got ripped off by this place. I used to always get my oil changed from the Kwik Kar franchise but never again I learned my lesson the hard way ...btw I got my car fixed for half the price ..Goodluck