It's probably Recoveries Corporation Pty Ltd, Level 7, 505 Little Collins St. They have your number in their database and are calling probably once every 6 month asking for money. If you give them money they'll wag their tail but you don't actually need to give them. They are looking for your address to start sending you letters. Any claim is ceasing in 6 years, so you might need to accept this spam twice a year for 6 years.

Keep getting calls from this number asking me to call and quote a reference number which is provided in a sms message.  Does anyone know who it is?

Its a debt collection company based in Melbourne. Ring at your own peril.