NOTICE: On cancellation of orders

In case that you have received an email to inform you of cancellation, your order might be defined by our fraud prevention function system as a high-risk transaction. Per operation policy we regret to inform you that your order needed to be cancelled.
Please kindly try using other credit cards or payment methods to attempt to avoid this situation.

See details on fraud prevention from the link below for reference.
https://help.shopify.com/en/manual/payments/fraud-prevention

Thank you.