They are debt collectors that work for multiple groups. Occasionally, you get a worker that is rude but otherwise is a safe number. Would still not recommend giving them details about your credit card over the phone but I'm just overly cautious like that.
February 1, 2018
About a prepaid theme park ticket.
January 24, 2019
Caller: Debit Success regarding a missed payment
I Called Back
December 19, 2018
I called back number (02) 9193 7880 rang once then gets disconnected automatically.