Doing arbitrage trading is restricted, this was new for me, maybe it might not be in there policy, because not every exchange restricted it. I never heard about this exchange and never even faced it even by accident. But the domain name arose a skeptical thought in my mind that this might be a fake exchange. Who told you to use this exchange, like how did you found it. I think you are new to crypto and don't know much about crypto exchanges.

Because if you will have any idea then you should be preferring top crypto exchanges, because that's the best practice to do, and even if you are newbie you should have check the authenticity of the website and must check how old this is and how many review it have, even if the reviews are fake, so before using it you should make this topic.
I feel sad that your funds are locked there for months for no reason, but you should contact the team to unlock the funds maybe they might give you some way to do it, but for that the exchange must have to be a legit one otherwise its sad to say but your funds must be gone.