Caller: Some collection company

Called several times over months, I barely understand the business name she claimed, only understand "... collection company“. She asked me for my address. I demand her to tell me what matter regard to, and she said she cannot tell me unless she can verify my address. I believe this is scam and hang up

It was AGL advising me that my account is due in a few days and that I will get overdue fees if I don't pay on time He said he could get AGL to give me an extension
My accounts are not overdue

I called back number (03) 9093 0652 spoke to a woman but could barely understand her when she said the company name.