Sort:  

I accidently clicked on spam on one of my important email, now i am not getting mails from them. They are very important for me. Can you please give instructions to get mails again from them? I need help please. I am using yahoo mail.

Mail from who? Just put the email address in the address book on Yahoo and they should be taken off the Spam list.

Thanks.

If you have marked their email address as Spam before, then it has to be in the Spam folder now. If you don't see them there, then, it's just not sent. I don't know how to solve your problem, only their support can, and unfortunately, Bittrex is very slow at responding, but the do.