Looks to be a telephone scammer using harvested personal information. They call themselves "Learn Exchange", and the guy who rang me (on my mobile) prattled about investment crap. They rang from the following Victorian telephone number:
03 7503 2528 (+61 3 7503 2528)
Apparently they sent me an email too -- I didn't see it. I told him, if I had seen the alleged email, I'd have inspected its headers and reported it as spam.
Of course, a quick search through Duck Duck Go reveals no such business calling themselves "Learn Exchange", but a search on the above telephone number shows others have received the same scam telephone call.
Had they rang on the home telephone number, I'd have transferred them to extension 666 on the PABX. I told the caller he should be thankful telephone calls do not have headers and hung up.