The repetition might seem annoying, but it also gives a chance to narrow the problem and save time in the long run.
Good advice above.
I don't like the corporate sort of nonsense that it so prevalent in call centre jobs.
This is the sort of venting you want to do with your friends or by yourself before the interview, because if it leaks out (and it will) while you're under stress, it will make you look too strong-willed to follow instructions.
They might ask you an unexpected question like, "Tell me about a time when you were in a crisis, and managed it." Then you will suddenly need to think of something meaningful that will give them the answer they need. Take a pause to think of the best one. But better yet, go through imaginary questions beforehand.
Stay level and calm. It's hard to say, "now I will be calm," but it helps me to think of the interview as an adventure with new people, where I will learn things and get to explore buildings I hadn't seen before. Let the interview be an achievement or job by itself.
Think about what the company needs from you. Many call centers these days are not run by the company you'll need to read up about -- they are service centers with many clients. You do the work for the end client, but you work for the service center.
An end client might want you to take as much time as possible with the customer, to keep them happy. A service center will want you to be efficient and reach results more quickly. Use that it how you answer your questions.
I had a recent "event" with a help desk person who seemed to be completely disconnected with the company, and maybe even in his living room with his wife also taking calls and his baby running around. The call lasted over an hour, and nothing was accomplished. He seemed to have his manual and no other way of getting information, so led me through a ridiculous rabbit trail where I was supposed to download several programs, allow him to access my computer remotely, even join external sites... without even answering my questions. He seemed to be paid hourly, instead of by the call.
They might ask if you are willing to work remotely -- using your home computer or phone to take/make calls.
I know a people who have done this sort of work, and seemed to like it. It seems to be a stable business in this unpredictable economy.