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Blockchain.info asks for browser authorization before you can access your account so if you haven't authorized your access than you can try to contact their support however i don't think they will give you info regarding any of their customers.
Also the address where your bitcoin end up may not be associated with blockchain.info wallet so i don't think you can get back what you have lost. [/quote]
There it is.
The address may not necessarily be a blockchain.info address you, in which case they'd have no way of knowing the email address.
And anyway, what's stopping the 'hacker'(if there was any) to use a throwaway email?
Also, I don't think there's any way that blockchain.info support will provide you with the account details of their other customers. That would be a breach.
Either you track the address where your funds went to or,
post the address and hope someone could track it for you and maybe it ends up on someone's known address. Who knows.