Thank you for your reply.

Yes, if they could send me the file then that would work as I have the set up password.

Earlier in the correspondence i sent them the wallet ID. This is when they responded by saying the email address attached to it was a different one. So I guess if they have found the wallet then the Wallet.aes.json is there also?

If they could just revert the email back to the set up one, this would solve it. I guess the only thing is that if someone else has entered the file then they may have changed the password?

Yes it's frustrating as I have literally all of the security info. It's just the email that has changed. I'm thinking that something happened during that period around 2016, and it could easily be an error by Blockchain.

I'll send them another email and let you know what happens.