I just saw this post from @mrwang:
Do not send money to @bitrex! @bittrex is the official account for Bittrex. Check the deposit options on their site and make sure you are filling in the fields properly.
Always "test send" a small amount first to make sure you are doing the transaction properly. I hate seeing people get scammed in crypto. Make sure you are not the next one!
EDIT: Update - @bitrex has returned to funds to @mrwang. Lesson above remains for the newbies though :)