Recently,There are more and more users said that their receipt has been canceled.and our server got the refund-notification from apple server.and users say that they never asked apple to refund.It's so wired. Is there anybody has the same issue?I will be appreciate it if you guys give me hand.

wget "https:\/\/static.gc.apple.com/public-key/gc-prod-5.cer"-2021-05-13 14:49:48-- 正在解析主机 static.gc.apple.com (static.gc.apple.com)... 111.206.179.235 正在连接 static.gc.apple.com (static.gc.apple.com)|111.206.179.235|:443... 已连接。 已发出 HTTP 请求，正在等待回应... 503 Service Unavailable 2021-05-13 14:49:48 错误 503：Service Unavailable。