message from another number left message no return google the name no such name "Market research Australia"

Same sh*t here, i put the call on mute and turned on the speaker. Call went for 6m 15s before they hung up. Said nothing.

Called from 0485 879 811 0485 879 811).

These guys are fking annoying.

Caller: Market research Australia?

Rang, played music and hung up. I called back only to get an answering service, seems like a hoax as I googled them and nothing came up.