The worst experience about the exchange I got on IDAX and COSS, my assets were lost on IDAX because the developer ran away with all the customer assets. Meanwhile, my experience at COSS exchange is that after shutting down the service, suddenly my account cannot be accessed. So I hope you never keep your assets on the exchange for long, because we don't know what they will do with our assets in the future.
I feel bad for your losses, it's our responsibility to do some research before using any service because a lot of people want your money and there's no guarantee that our funds will save with their service. keeping our assets in an exchange for the long term is not recommended from the start and it's better to buy a hardware wallet to increase your security from any phishing or scam. keep that event in your mind so it will become your experience so it won't happens twice.