Caller: Scammers

I don't think the actual owner of this number is to blame but I do believe it's being used by scammers claiming 'someone has made a $xxx transaction on your credit card and we will assist you to undo it'. The original call came from 0403 311 711 but when I said I would check my credit card transactions on my computer and get back to them, they told me not to and kept saying that I shouldn't do anything except what they were going to tell me to do. I told them I thought it's a scam and wanted to check elsewhere first and hung up. The phone rang again from this number 0403 679 558 and it was 'the supervisor' pressing me to follow their instructions to fix my problem. I asked them what my name and what credit card number had been compromised and they couldn't tell me. I called them some nasty names and hung up but then my phone wouldn't work for about half an hour.