Concentrix Customer Service Agent interview questions

Three stage process over the course of a month. Online assessments and face to face interview including questions and role play. I thought all assessments went well, however, I didn't receive an offer at the end. The process took a great deal of time and I felt I was being reassured that I was doing well at each stage so at the end I was left a little confused. I emailed to ask where I went wrong and received no reply. Rather dissappointing for a company that prides itself on friendly and helpful customer service.