"No good deed goes unpunished"

Our delivery man had gone home for the day. I got a call for a plant delivery to the funeral home and thought that I could take it over after work. I did some research, finding out where to drop it off. However when my friend and I arrived, we couldn't find the proper door. The director made it very clear that she was busy and didn't have time for me even though she offered to take the plant. My friend had driven me to the funeral home so the plant would have ample room. I closed her door too hard since I'm used to slamming our van doors.