That's sad but you have to check every update where you are depositing your coins. This is the reason why it's always said that "not your keys, not your coins". With that, they can charge and suck your coins until you ran out of zero. And that's the reason why many just pull out their funds on these exchanges when they don't even have plans of visiting it once in a while. That inactivity fee is part of their rules and you can't do anything with that and as for that withdrawals that are blocked for that coin, contact and ask them to allow you to withdraw the remaining amount that you have there.