As the first point of contact between a company and the client, a customer service representative must have impeccable communication skills and conflict resolution abilities. Expect your interview to consist of a lot of role-play or "describe a time when..." questions that will test your ability to deal with irate clients, work well under pressure, and always keep a calm and professional composure.
What would you do if, on a product release day, 5 people were yelling at you, and trying to get your attention, all at once?
Take it one person at a time. Acknowledge all of the customers and assure them that you'll be right with them.
Remind calm, ask them if they can wait just for a bit til you finished doing business with the customer. One by one helping them out and understand taking time and patience. learning their time very valuable that I take this seriously to make sure everyone gets out calmly and happy.
Remain steady and focus, remind them all they will be taken care of in an orderly fashion. Kindly you state you are one person and can only take one person at a time and to please be patient