Customize AVS mismatch error message

snippet.php

<?php

add_filter( 'wc_payment_gateway_transaction_response_user_message', 'sv_customize_avs_mismatch_message', 10, 3 );

/**
 * Customize AVS mismatch error message.
 *
 * @param string $message message to show to user
 * @param string $message_id machine code for the message, e.g. card_expired
 * @param SV_WC_Payment_Gateway_API_Response_Message_Helper $helper helper instance
 */
function sv_customize_avs_mismatch_message( $message, $message_id, $helper ) {
  
  if ( 'avs_mismatch' === $message_id ) { 
    $message = esc_html( 'The provided address does not match the billing address for the cardholder. Please contact us.' );
  }
  
  return $message;
}