How do I trust your dealership? I bought brand new...

How do I trust your dealership? I bought brand new car from this dealer a year ago. But I came back for two warranty issues. In addition, my driver side door got paint scratches during warranty repair recently. When I tried to drop the car for body shop, there was no loaner car available. I had to go back next day. Please don t try to cut the corner to fix the mistake.