请问拿到18fall哥大CS的MS录取同学是否收到 Official AD Letter

各位拿到了18fall 哥大 CS 硕士录取信的同学，不知道你们是否收到了Official AD Letter？
我是2月13日将近24点的时候收到了 Decision Letter 的，信件里说过几个工作日会发Official AD Letter过来

The Office of Graduate Student Affairs (GSA) will send your official admission letter electronically within a few business days, which will include instructions on how to respond to the offer and more information on the next steps.

但是我暂且还没有收到。另外邮件里提到说：

If you do not receive your official admission letter after a few business days, you may send an email to seasgradmit@columbia.edu.

我发邮件给这个邮箱问情况，然而木有回应 hhh。

这边发帖是想问一下同样情况的小伙这个进度。谢谢！

P.S.再求一下哥大 18fall CS AD 的组织与群~~