请告诉我如何通过Flipkart卖家API取消订单。
我试过了，但它给了我错误：

$url  = "https://api.flipkart.net/sellers/v2/orders/cancel";
$curl = curl_init(); 

$json = '{
  "orderItems": [
    {
      "orderItemId": "225561595849261000",
      "reason": "not_enough_inventory"
    }
  ]
}';
curl_setopt($curl, CURLOPT_URL,$url);

curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $json);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_HTTPHEADER, array(
'Content-Type:application/json',
'Authorization:Bearer xxxxxxxx',
''
));
$result = curl_exec($curl);
$ee = curl_getinfo($curl);
echo "<pre>";
//print_r($ee);
curl_close($curl);

$result = json_decode($result,true);
 print_r($result);

输出：Array（[errors] => Array（[0] => Array（[type] => ERROR [code] => DEPENDENT_SYSTEM_CALL_FAILURE [message] =>对依赖系统的调用失败。请稍后重试[params] => Array（）

)

    )

）
请帮我取消订单。
提前感谢！！