I sold few coins on vindax that worth 10$ and I don't receive any in my wallet after withdrawal, I track transaction ID on etherscan and it says 'Failed', then I head to their telegram group to complain, guess what happens next? I was told to deposit 60$ worth of Eth to an address from a PDF, I screamed scam and they block me off their telegram group, here is a screenshot

All vindax exchange team are scammers, you've been warned, stay out of this exchange at all cost
Hmmm this is strange. Although I have never used Vindax exchange for any reason. But on a second thought, are you sure you chatted the right Vindax support? We all know how scammers prowl telegram chats pretending to be project supports and admins. Its weird for an exchange to even demand for coins from a user asking for issue to be resolved. Well, if it's truly Vindax support who messaged you then they are nothing but scammers. Everyone should avoid them.