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
I also do not like vindaz as an exchange platform, it's always zero value or no value at times
As regard that message, i advice you block any representative claiming to be vindaz or another exchange and report such to the proper admins.
Also remember that admin never pm first