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
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All vindax exchange team are scammers, you've been warned, stay out of this exchange at all cost
I faced the same problem once but with different exchange name RightBTC. Vindax have many problem but i'm not sure that you contact with right admin or not. When i sold some altcoin in RightBTC and try to withdraw ETH in my main wallet i faced same issue. I contacted their telegram group and told about my problem. Then suddenly one person {Fake admin who used RightBTC name (not username)} PM me they are looking my issue and after few minutes that person told me to deposit some eth a specific eth wallet address. I've doubt about and told them again about it. Finally i was able to withdraw my eth from their.
The thing is now days scammers easily manipulate people with Telegram ID. So before you deal with this kinda issue you better think twice. Double check users
username not just name.