Something about your plan has been automatically renewed for $199.
I then hung up

A Robot voice “Received a purchase of $299.99 and the same will be debited from your account within an hour. If you have not paced the order, then please press 1 to speak with our representative to cancel the order.

Robot voice:
"Received a purchase of $299.99 and the same will be debited from your account within an hour. If you have not paced the order, then please press 1 to speak with our representative to cancel the order or call us at (08) 7200 1045"

Missed call. Called back and got message that the call could not be connected. Scammers!

Phishing scam. Automated message advising you to call back if you did not place "the order"

Voicemail with a female with an Australian accent demanding I reply within the hour or my account would lose hundreds or similar. Hung up before 'press 1 next'.

Scan call - recorded message saying there are purchases on your Amazon Prime Account for $299, press 1 to speak with customer service if this was not authorised.
Be careful - do not give any details.

it said about i purchase something from Amazon prime