Caller: Poltergeist

My fiancé of over a year suddenly had this number add itself into their iMessage system as the number to send/receive with. Calling the number gets a “disconnected” message.

I called back the number (02) 8266 5511 and reached vm that said I reached DigiTech Australia

The number above is one of a series of numbers which I believe are all linked to a call centre I know not where. Irrespective of the number they call me from the conversation goes along the following lines: The caller says "Hello Mr Tran" and tells me that they can save me money on electricity bills at my home in Prahran Vic. I point out that I am not Mr Tran, I don't know who he is, I do not live in Victoria and they obviously have a wrong number. Sometimes they apologise and promise to delete me from their calling list. On one occasion the caller asked me to pass the phone to Mr Tran! This is an ongoing annoying situation. It seems the call centre has been sold a list of people to cold call and somehow my mobile number is on that list against someones name who isn't me. They do not delete me from the list, they simply call me from a different number (I block these as they come in) later. So far I have received a couple of dozen calls in the last year.