A friend of mine told me that Bittrex didnt credit her with BTC after selling some coins. So she made 3 withdrawals to move all her coins out of Bittrex. Then Bittrex halted the final withdrawal, its marked Pending. As you can imagine, they have not yet bothered to reply to her email about freeing up the withdrawal.
She may feel they are just plain crooks... its sad for me to observe since I thought Bittrex was supposed to be one of the reliable exchanges. Well, I hope they prove me wrong, but from what Ive seen, they are operating just like petty criminals.
Is his/her account is verified?
I never had an issue with Bittrex though I'm not actively using it now. My account is verified and I even link my bank to my account so I can easily transfer money. All these accusations could be true, if you want to spread this information, you can make a scam accusation to make people aware about your friend's situation, make a thread in the scam accusation board and follow the format, make sure evidence are attach.