All the theory exam records were found but had to be signed by some guy who doesnt work there anymore.
This 'guy' is the Examiner personally responsible for the security and administration of the Exams. You must demand his name and contact details, and pursue him directly. Tell him that if he does not sort this out for you immediately, you will report him to the CAA for allowing unauthorised people access to, and use of the Exam Papers.
MJ