The fact that they listed in 3 exchanges (which i assume Eroiy is still trading on) would lead one to believe there was probably some form of naivety from the Developers instead of an outright scam.

I recently took part in an ICO and when the time came for distribution the coin was listed on an obscure Korean exchange & only people with Korean Bank account and Korean ID are able to register on the exchange.  I was helpless and could only watch the value depreciate on a daily basis and could do nothing about it.

Eventually it got listed on another exchange where I was able to offload, albeit at a bit of a loss, though I lost a lot less than I expected as the coin slowly recovered to a level where I was happy to cut losses and get rid.  If I'd have held on I would be a bit better off, but would be still short of the ICO price.

I know it seems like a hard pill to swallow, but I would advise you to hold (not that you have any other option at present) and watch the markets where Eroiy is trading, keep an eye on their social media for other exchanges coming on board and hope you can recover some of your losses.

Like yourself I thought I had done my due dilligence and felt like I had been robbed.

I hope things go your way ...  Good luck..