Auto parts service near Dunedin, FL

My 2011 car stalled out multiple time and was accelerating when in park. Willow bend automotive called and told me my filter was dirty and once they cleaned that the problem went away however they found Multiple issues. Over 1500 dollars to fix it was a lot but we have to have a reliable vehicle. Fast forward to the day after we got the vehicle fixed we noticed it was missing a little when we slowed down or in park. A couple weeks later the car stopped while behind another vehicle on a busy road. The thing I brought it in for was NEVER fixed. So now more than 500.00 more they want to fix something that was supposed to be fixed. Unbelievable. Yesterday I asked the mechanic if it would cost me something and today they called back and told me a different story. I went by good reviews. Never again. I feel scammed.