They said did I remember filling out some survey form in the past 6-10 months. I said No. Then they said that was because it was such a long time ago that I must have forgotten. Good news was we had won a holiday anywhere in Australia or NZ anytime in the next 2 years and it will only cost us $314 or so.
Beware.

Rang twice today left no message

Caller: Returned missed calls Australia wide

I am the owner of this number which has been hacked by scammers. telstra is investigating and passed it onto relevant authorities. Sorry for any inconvenience to you all. It's out of my control 😔

Caller: AL Travel?

Same as Gavin. Said that I also had won a 7 day holiday worth $2000 and it would only cost me the sum of $314.50. Guy had London cockney accent, perhaps he used to work for Arfur Daley? Number is probably spoofed. Said I wasn't interested as such "offers" came with terms and conditions which made them unviable. Gullible's Travels.
I believe their ruse gets you to give out your credit card details then you get fleeced. Hang up on them.