silence for about 30 seconds, no response to my multiple 'hello?', then what sounded like a possible call centre noise in the background before they hung up

I think this is a job service provider. They left a message but terrible communication skills. Mumbled and ran off a phone number too fast & unclear to understand. She didn't provide a name or business name and when I returned the call from the number that called me, it came up as Beenleigh and disconnected. Strange. The reason I t think it's a job service provider is because I was waiting for a call back and this is the only call I received.