I just noticed I got a phone call & voice mail maybe an hour ago from a potential employer. It’s over 10PM here already so I feel it may be too late to return the call today. How long is too long to wait to call someone back? Would it be okay if I called back tomorrow morning/afternoon?

Hello, I have an interview with a call-center (Alorica) tomorrow morning for a customer service agent position. I’ve never interviewed with a call center, and Im not too sure what to expect. What kind of questions will they ask? Is there a particular type of answer they’re looking for for said questions? Is there anything I should know beforehand? I’d like to be as prepared as possible so I can get this job!! Any tips would be very useful! Thanks!