It seems like the caller from +64800441403 is posing as a bank representative to alert you about supposed suspicious activity on your account, including a large payment to Amazon. However, this is likely a scam. The caller will ask for your account number and PIN to "stop" the payment, but this is a tactic to gain access to your financial information. If you receive such a call, do not share any personal or financial details. Instead, hang up and contact your bank directly using a verified number to confirm if there is any real issue. Stay vigilant and protect your sensitive information.
The person on the line alleged suspicious activity on the bank account, mentioning a payment exceeding $900 to Amazon, then requested the account number and PIN to halt the transaction.