Not updating status with 1

prepare("SELECT * FROM tblvehicles WHERE id='".$_REQUEST['oid']."'");
$query->execute();
if($query)
{
if($query->execute() == 1)
{
$order = $query->fetch();
$url = "https://uat.esewa.com.np/epay/transrec";
$data =[
'amt'=> $order['PricePerDay'],
'rid'=> $_REQUEST['refId'],
'pid'=> $order['id'],
'scd'=> 'epay_payment'
];

$curl = curl_init($url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($curl);
curl_close($curl);
$response_code = get_xml_node_value('response_code',$response );

if ( trim($response_code) == 'Success')
{
//$sql2 = "UPDATE tblpayment SET pStatus=1 WHERE id='".$order['id']."'";
$query2 = $dbh -> prepare("UPDATE tblpayment SET Status= Status + 1 WHERE id='".$order['id']."'");
$query2->execute();

echo 'alert("Thank you for purchasing with us. Your payment has been made successfully.");
window.location.href="http://localhost/onlinecab/index.php";
';
}


}
}
}


function get_xml_node_value($node, $xml) {
if ($xml == false) {
return false;
}
$found = preg_match('#<'.$node.'(?:\s+[^>]+)?>(.*?)'.
'#s', $xml, $matches);
if ($found != false) {

return $matches[1];

}

return false;
}

i have uploaded full code

please give me a solution