This is very strange as their website is still operating
https://sharktraders.com/ and everything still appears live and well. The support email address seems to be correct as it is the same that appeared on their website
support@sharktraders.com. But if they are indeed bankrupt, the company would be placed in receivership and an administrator would be usually appointed either by the court or the financial regulator to handle the liquidation and all your account information as well as your banking detail would be all forwarded to the administrator to process the return of the money back to you; it wouldn't be the company themselves who would be handling this. And even if the company is handling the withdrawal request, they wouldn't need you to provide banking details all in an insecure format via email too because they would already have them on file when you made the deposit with them.
I would be more careful in providing banking details over an email to anybody.