AJ
I've been getting calls from this number too. The lady identified herself from Wyndham Vacation Resorts. Here is their contact details:
AU: 0755128888
Intl: +617 55128888
Wyndham Corporate Centre
Level 7, 1 Corporate Court
Bundall QLD 4217 Australia
Postal address: Box 7493 GOLD COAST MC QLD 9726 Australia
You can contact them directly and ask to be taken off the calling list.