I don't know who this caller is but they leave threatening rude messages

Repeat calls... they don't respond when you answer the call and when you ring back they say they are cca credit something or other...

So the lady claims to be calling from a debt collector company and said I have an outstanding bill. She identified that someone had been stealing my identity. she then said that I'll need to report to my phone carrier about it but she'll send me an application to fill out via sms. I received nothing from her. I think she's a scammer.

I called back number (02) 8015 2711 spoke to a woman who said company name is Metro Credit.

no idea who but repeat caller