This situation is getting a bit annoying. They don't even answer to tickets anymore
It is a know problem from an unknown cause.
At all: never... NEVER... NEVER! leave your crypto at any exchange unless you are a dayly trader.
Your coins feel much better on your local backuped wallet.
Its almost certainly a wallet upgrade issue - when they upgraded from 1.7 to the current version (with an upgrade in between), it seems they didn't know they had to use an SSD for Syncing. (Just like me.)
See this post on Reddit for more:
https://www.reddit.com/r/ByteBall/comments/7pxko2/gbyte_down_on_cryptopia/
On the other hand, my personal light wallet is safe, I have a full backup and I plan not to do anything with my GBYTE before the March Airdrop.
I do hope Cryptopia will solve the issue before then!
I had never problems with cryptox.pl
Why don't you just sell your GByte fot BTC on Cryptopia send them to Cryptox and buy GByte there?