First, ensure that the billing address you entered matches exactly with the information on file with your credit card company. This includes your street number, street name, apartment number (if applicable), city, and zip code. If your card is still being declined, you may need to contact your card issuer, as multiple failed attempts can sometimes trigger a security hold.
If the issue continues, feel free to reach out to us at support@alldayshirts.com for further assistance.