These include the RSPCA and PCYC raffles and it turns out the calls are all legit.
Turns out one organisation is responsible for a lot of the calls (Insight Charity Fund Raising Services) so the fact the prefixes are all the same looked suspicious at first (02 9003 - ).
PCYC New South Wales
PCYC Queensland
RSPCA
Australian Cervical Cancer Foundation
Asthma Foundation Tasmania
Green Cross
Heart Research Institute
Kidz Wish
Souths Cares
Isn't the first rule of credit/debit cards that you never give details to a number that calls you? I didn't go through with it so maybe that isn't in fact the case how it works?
Add the numbers to your blocked list.