Not impressed

I am really unhappy with Nissians services, i have had my car for two years and the number of time I had to be taking my car in for fixing is numerous and I am starting to hate being around your dealership, now to top it off, my car has been with the dealership for the past 2 weeks and I need to be doing the run arounds to make sure I get feedback from someone, the principles promised to call me back up to date I have not received his call, NISSAN I NEED MY CAR.