Need help

Hello in my 20s from Location: Missouri I recently went to a car dealership around my area cause I was in need of a new car I have decent credit for my age and was all ready pre approved by my bank well I go to the dealership and pick out my car I want then we sit down talk paper work come to find out they only finance with their bank and I was in need of a car bad so I accepted the deal a week later comes to find out a major safety feature on my vehicle does not work and I’m paying way double what the vehicle is actually worth I just feel like I got a bad deal it’s not that I can’t afford it I just feel like it’s not worth it to me