AT&T interview questions

I filled the application out online, got a call to come to the first interview which was to see how well I do on a test on the phone system that is used to handle the calls from the customers, I passed it. I received in my hand a card with my next interview which was at AT&T customer services center. I was introduced to other workers and supervisors and managers. I had to wait to meet with the person that was to interview me. The interviewer met with me, asked about my past jobs, experiences with people. She said she will call me on Tuesday if I get the position or I will get a email if I didn't. I got the email. I just knew I had the position because I past the tests, the other people liked me and I am a people person. I still don't know why I didn't get the position.