Caller: Not sure

I called them back as the location was in Southport QLD so I thought it would be an interviewer calling but when I called back it sounded like an Asian lady in a call centre and she said that she doesn’t have any calls going out to my number on their system and she can’t help. This has actually happened a lot with other numbers too. I asked who was calling and she said she can’t disclose the company name since I’m not a “customer”

I called back number (07) 5657 9056 rang 4 times then goes to busy tone.