I have had a few missed calls from this number and when I called it back it says it is disconnected

Claimed to be from some employment service - said I had won a Coles gift card and then proceeded to ask for confirmation of details I had put on the gift card form - as soon as I said I had been receiving a lot of marketing emails - he hung up - had Indian accent - don't answer these calls

This number has called me three times in three days. I finally called back today and it says that the number is disconnected. Very annoying!

I called back number 0499 701 571 rang 5 times then goes to busy tone.