Wells Fargo Customer Service Representative (CSR) interview questions

I applied and after two weeks or so I received an email to schedule myself for a group interview. At the group interview there were three questions that had to be answered by each candidate. The recruiter was very informative but spoke very fast. I understood the questions and as I was answering one of them I was interrupted by the recruiter who told me to speak up. I wasn't very loud but I wasn't whispering either. The way it was done was a bit embarrassing to me being that there where other candidates in the room and no one was speaking any louder. I am overqualified for the position so I didn't really care that I didn't get scheduled for an in person interview. However, I think that recruiters need to be more professional in how they conduct themselves in an interview and not sound so arrogant.