This has been posted already.
Regardless, it's not a different representative each time. Rather, it depends when you submit the refund request. They have different schedules, and there are a limited number of employees working at making refunds. Weekdays 9:00 AM to 6-ish is the schedule of one employee, while another employee's schedule is kind of Weekends from 11:30 to 7-ish... etc etc. I have a few of their name's written down, as well as what time and day they responded to the request. Also, another thing is the timing of the requests. I'd say let a few days pass between each request, and it also helps to keep a running situation. What I mean by this is that, make an excuse that can be followed up with another one that is actually believable.
I've used this strategy, so far I have not been caught (For nowww, I REGRET NOTHING). I have had a maximum of 5 refunds per each Apple ID (I'm talking hella-big refunds)
Anywho, I also suggest you play the role of a concerned, well educated parent, it's a bit more efficient.
Happy refunding guys.