I took my 2016 mustang in 2 weeks ago to get the h...

I took my 2016 mustang in 2 weeks ago to get the heating core replaced and received my car back with more damage internally by the mechanic. First the start/stop button was sticking not allowing me to start the car or turn it off, then my bluetooth stopped working which they made me pay for when I brought it back the 3rd time and I picked it up yesterday and now only the passenger side of my interior light works and my underdlow kit is not working at all. I love my Mustang but the damage they are causing by going repeatedly inside of it makes me not want it anymore