Dear Olly
I send order details to an application by using add_action( 'wppizza_on_order_execute', 'my_order_app', 10, 3);
and every thing works fine but when customer make a payment via epay I got customer details as NA
I get customer details as below:

$post_data['cust_name'] = $order_details['customer']['cname']['value'];
if (trim($post_data['cust_name']) == '') {
$post_data['cust_name'] = 'NA';
}
$post_data['cust_address'] = $order_details['customer']['caddress']['value'];
if (trim($post_data['cust_address']) == '') {
$post_data['cust_address'] = 'NA';
}
$post_data['cust_address'] = trim($post_data['cust_address']);
$post_data['cust_address'] = preg_replace("/\r|\n/", "@@", $post_data['cust_address']);
$post_data['cust_address'] = str_replace("@@@@", "@@", $post_data['cust_address']);
$post_data['cust_address'] = html_entity_decode($post_data['cust_address'], ENT_QUOTES);
$post_data['cust_phone'] = $order_details['customer']['ctel']['value'];
if (trim($post_data['cust_phone']) == '') {
$post_data['cust_phone'] = 'NA';
}
$post_data['cust_email'] = $order_details['customer']['cemail']['value'];
if (trim($post_data['cust_email'])==''){
$post_data['cust_email'] = 'NA';
}
$post_data['cust_instruction'] = $order_details['customer']['ccomments']['value'];
$post_data['cust_instruction'] = preg_replace("/\r|\n/", "@@", $post_data['cust_instruction']);
$post_data['cust_instruction'] = str_replace("@@@@", "@@", $post_data['cust_instruction']);
$post_data['cust_instruction'] = html_entity_decode($post_data['cust_instruction'], ENT_QUOTES);
$user_id = $order_details['ordervars']['wp_user_id']['value'];
$number_of_previous_order = 0;
if ($user_id) {
$ocount = $wpdb->get_results("SELECT count(*) as rcnt FROM " . $wpdb->prefix . $order_table_name . "", ARRAY_A);
$number_of_previous_order = $ocount[0]['rcnt'];
}
if ($user_id && $number_of_previous_order > 1) {
$post_data['isVarified'] = 4;
} else {
$post_data['isVarified'] = 5;
}

Is there any thing need to be changed?