I didn't answer, they didn't leave a message. I presume it's a scam & have blocked the number.

Scam! Do not engage.

Answered call and it was a recorded message stating they were from the Immigration Department and to press 1 to retrieve important documents relating to my immigration status - scam call

Caller: Automated voice (from the immigration department)

Automated voice from the immigration department telling me they have attempted contacting me many times and my remaining in the country is an offence. When I called back the same automated voice says this number is not in use. Deleted and blocked.

scam

Caller: Scam

Scam call - did not answer phone but the caller left an automated chinese voice message after the call

I don't know the number, didn't answer. No message left, so I assume a scam & will block the number.