iPhone 4 Activation Lock with non-existent email and blank receipt

Hello everyone,

I have this iPhone 4 with activation lock, and I have forgotten the password but I do have the email address, it was my old one but it got blocked or deleted, I don't remember what happened to it but it says that this email do not exist anymore, so now I am stuck on Activation lock with non-existent email address to which I cannot reset the password, and here's the neat part, I HAD the receipt, but now it's just blank sheet of paper as there is nothing readable (literally)

[Re-Titled by Moderator]

Original Title: iPhone 4 Activation lock