They call me at 5:00 a.m. repeatedly throughout the week. They also then call multiple times during the day. It has been happening for almost a month.

Did not leave message,

Caller said they were calling about my credit card. I hung up after telling them I refused to answer and to stop calling.

I didn't answer this one and I don't know what it is. I can understand that its a NM number automatically.

scam calls

I question a charge on my VC what was purchased.

It is somebody calling likely using Messenger or other new computer phone system that redirects via Sydney company, and it happens after receiving other international calls from any country asking for language and specific pin number. It will ask for pin number when you calling from line phone or mobile phone.