Said they were a company that outsources accounting/bookkeeping to the Philipines.

I called back the number (02) 8004 8525 but the phone just kept ringing

Off-shoring services - very annoying

I'm in property management and a woman with this number called me and asked to speak with my boss. When I said he was unavailable, she hung up.

Called my company asking to speak with someone and when i said they were away they just hung up.

Comes up as suspected spam. I always now answer these, and straight away put the line on mute and don't say anything. As I am worried about voice recognition data.
They knew my name and said hello, but I didn't answer and hung up.