AVS Gateway Error During Checkout

This means that the billing address you entered is not correct – it must match the address of where the credit card bill is mailed and what is on file with your credit card company.
You can enter a new address or update the address here: https://directtextilestore.com/index.php?route=account/address
Make sure to check that each input is in the correct field and you are using the correct billing address.