this call didn't come up in my recent calls as missed, but I got a message saying I missed a call from this number.

See previous comments referring to study post job applications. These are getting annoying.

They call you to see if you want to do an online course to help you get a job quicker i get offered theses all the time from applying for jobs through job search sites

I have been applying for jobs, but not ones in Sydney. I got a call this morning, did not answer the call but caller didn't leave msg either. But reading from the previous comment, I literally have no comments about what to do to the caller/possible scammer

This company claims to know you have been applying for work "online" then asks - what job you are working in !?
Privacy Breach - Going to report this lot.