I also had two missed a calls from the mobile number +61(0)408724186. The first being on 10/07/2020 at 12:47pm and then again today (16/07/2020) at 10:17am. Neither time did it leave a message and both times I tried to return call but the number is disconnected. Beware of scammers from this number!
I picked up their call when doing groceries and it was something like equity investment to lower my income tax. Started to talk about workshops, and I hang up. I tried to call them again because I want to check the company name and the number was disconnected.