If a coin is in maintenance they shouldn't even let you have the deposit address. Why would they give you a deposit address if their wallet was offline?
Exactly!
Though of course, you had some responsibility in not checking closely before you deposited as well.
I do not think so: Every other exchange I know just do not take coins if they KNOW that they cannot process them. As example on binance the deposit-buttons are greyed out. As a new customer to an exchange you cannot know, that they want you to visit an extra site to read out this important information. And even if you know as an experienced customer of HitBTC that you have to do this: There is no guarantie that a wallet not loses the ability to accept deposits in the time between you check and deposit or the coins arrive.
Also, why were the coins moved if the wallet was supposedly "offline for maintenance"? I'm not sure about that.
This is what I was asking me myself for a week now. So very offline the system does not seem to be.
Also it's definitely not good the way they ignore to support messages and even close tickets without resolving them.
Yep, even if there are no scam or fraud attempts behind doing such, they lose confidence and will get broke sooner or later.
HitBTC has had a pretty shady past, hence its negative ratings on bitcointalk. There are people who complain of their accounts getting 'hacked' and random trades being placed constantly. Also, you can pay to get your coins listed for a certain amount of time with levels of marketing IIRC which means that they probably don't care about customer experience at all. All about getting the money from ICOs.
Now I know this by own experience. I even think, the different cryptos should not list them at their pages as valid exchange where one can get their coins. Better to include an appropriate warning section and list HitBTC there.