If you really typed your logon details into a bogus page, then the first thing you need to do is contact the bank and inform them that your account has been compromised, otherwise you'll be too busy dealing with bankruptcy to worry about your PC.
As you haven't given us any clue as to what malware you think is on your PC, or what the symptoms are, it's pretty much impossible to advise on how to get rid of it. When you say that you've tried malwarebytes, what exactly do you mean? That you scanned and it found nothing, or that you scanned and it found something but said it was unable to remove it?