Caller: a man with a foreign accent

he originally called from 0426 868 098 and then from 0422 911 551 then this no, 06 4735 988 802 and then 0421 997 207 and finally 0421 977 207. he said he's from National crime authority of Australia and it started with a robocall. I looked up on google and the NCA does not use robocalls so it's obviously a scam. I could hear a lot of other people talking on phones so this must be a hyge scam with lots of people making calls. they ware telling me my ID had been compromised as well as my tax file no. the call cut out three times and he rang me back from different numbers asking why I and cut the call. I hadn't so this gave me more suspicion. after the third attempt he didn't try again. this land line no is 06 which is not used.