I called back number (03) 8686 3836 reached voice mail but did not say for what company.

Sounded like I initially got a short recording; I couldn't hear what it said because of the noise around me & they rang me on my mobile. I said "hello" again & then got a human male voice but because of the noise around me couldn't hear his few words. He promptly hung up before I could say or do anything. Suspect caller to be scam caller.