have you contacted their support? Have they said something about this issue you are currently experiencing?
would you mind sharing a screenshot of the transaction? this is just to confirm that the withdrawal you made is marked as $85 but the amount you received is only $68.
Yes. I contacted them yesterday and I received the rest of BNB today. The problem is, their support is too slow. If you inquire about something today, they cannot give you an ETA of the resolution time.
Here is the screenshot that you asked for

Here is the withdrawal they sent;
https://bscscan.com/tx/0xf8532af258d9e1ce3168c5a7acaf69404ccb623834f12dee1ae78e7987e4a5f7Today, I received the rest amount. But they did not reply to me via email or support. They silently sent it. The communication is important.