Most likely, your order was rejected and canceled by the fraud prevention system of our payment gateway. Sometimes this happens for valid orders, though. The most common reason for this is incorrect billing information, which does not exactly match with the customer's credit card details (for example, mistyped address or zip code). Usage of a VPN can also attribute to that.
In cases with Paypal transactions, this often happens when buyer information does not match what PayPal presents as legitimate for the account used. In a non-lawyer language, this might mean that you're from a country or region that's under US sanctions.
In any case, we can suggest placing a new order with correct billing information, using a different credit card or another payment method. If nothing helps, please send us a message and we'll try to help you out.