American Red Cross interview questions

Applied, email from recruiter saying I wasn't selected, email from recruiter saying I was selected, questionnaire, interview with two managers, offer, background check and drug test. After receiving the offer no one wanted to answer my questions. I wanted a letter stating my employment. I knew I didn't have anything to hide in the background check and drug test but kept getting told that my employment was dependent on them. Showed up for my first day and no one was there to great me. Sat and watched a teleconference of orientation. No one was there when I showed up each day or when I left. No one checked in on me. One day my supervisor was suppose to have lunch with me and they snarled up their nose and said go get your own lunch.