Just to be clear, i had a walkthrough on what happened during our apply request: is clear that i never talked with the real Bittrex and that a scammer attempted to convince me to send money.
I want to confirm that i avoided scam and i never paid nobody (just for pure lucky)
Later i will post a detailed version of story with mails and screenshot, in order to inform other devs and prevent this form of scam.
Hope that my good faith is clear now