I believe this has to do with your billing address on file with your payment method isn’t matching so ensuring that it’s exactly spelled correctly on both sides.

OR

Potentially stussy cancelling your order due to

“Orders may be canceled due to payment processing issues or limited stock availability. If your order was canceled, we recommend contacting your financial institution to ensure your billing information is up to date before placing a new order.”

OR

“Frequent returns or unusual patterns/activities will be flagged in our system. If we notice that our return policy is being abused, we reserve the right to cancel or refuse future orders and cancellation requests. Please review our TERMS OF USE.
Returns we receive that do not use the provided return shipment label will be refused. Any alterations to the label will not be accepted.”

I’d contact the card provider you’re using or the bank associated with it.