Had car repaired 2 times spent 2300 and car still is having problems?

My car stalls when at a stop light or when turning.The Car hesitates on the highway at 55-65 mph. The check Engine light is on. Had the car fixed 1st time had to have the front end repaired then brought the car back because it kept stalling and they said it was the manifold so they repaired that. Well that did not fix the problem. Any idea of what it may be? I'm just tired of bringing my car back to them.