Locked out of account and tried all methods offered. This is my last hope. Can you try and help me please?

I have forgotten my security question for an old account that I stopped using for a while and want to get back in. However I didn't use all real personal information when I set it up due to wanting to keep privacy, however I've forgotten those details and even after filling many surveys I can't get back in.  I know some of the e-mails saved on there, folder names and a few contacts I had. Is there any way I can get back in as I still have e-mails sent to there and other accounts registered with that e-mail address?

Many thanks,

Simon

Note: I got a response from this before but the link expired by the time I saw it.