Saying they're calling me in relation to shares i hold in a company i've never heard of

Called 2 days in a row at same time. Yesterday rang out, didn't leave a message. Today gave one ring and stopped. Don't know number, I didn't answer. Unsolicited call

Caller: Shares related

Someone calling regarding capital raising in ASX company Sultan Resources, a company I have a stockholding in

Recieved a call on our landline phone which requires caller to announce themselves allowing me to accept/reject the call. The caller announced himself as my step son and sounded like his voice so naturally I pressed 2 for 'always accept', only for the caller to hang up. My wife called her son who told her it wasn't him who called. I believe the caller may have recorded my step sons voice and played it back to now have direct access through our phone. We will have to wait to find out what comes next!

Left message regarding a company called Identity ID. Voice was Australian and spoke quite fast and slightly garbled. Phone number and contact is unknown to us