Caller: Scam pretending to be real company

A real company in melb has a scam artist using a syd ip phone number (above) & a Gmail address - claiming to be them & asking for your credit card number to give you a "refund"
Didn't make any purchase - real company know nothing about this - have reported to police

I called back number (02) 8005 1690 rang once then gets disconnected automatically.

Caller: Scam from india

Company call up and say they need to give you a refund and want your credit card number - said I paid $600 for my computer to be fixed in April (I didn't)
And they had an address I have only ever used to register a domain name (not my real address)
When I said I had just been a witness in a federal police case similar (true) he lost it and started begging me not to call the police