no answer when i called back

Caller: Claiming to be from telstra

Said I had suspicious logins on my telstra internet. I don't even use telstra. Said I was going to report her. She then hung up.

Spam.

Caller: “Amazon Prime”

They claimed to be calling in regards to my Amazon Prime account and how I was going to be charged $39.99 to keep it. Asked if I wanted to keep it or cancel it, so I said keep it and they said ‘ok so we will continue to charge you $39.99 a month’. I said ok and she ended the call

Same as the above message. No answer when you call back. Blocked.

Rang, when I answered they hung up.
When I rang back no answer