For one thing, stop using debit cards on the internet. Credit cards do not take the money out of your account first, thus offering you an additional layer of protection, and many like Discover in the USA are known for offering $0 liability for unauthorized purchases. They can be more of a hassle to use like they may call your mobile number to check on a suspicious purchase, but at this point it seems you want that level of paranoia. Don't miss a rent (or any important) payment bc you have nothing left in your debit account to work with! (Even if it is added back quickly, will it be handled quickly enough?)