Well, well....
Amex have closed my dispute. Not our problem guv' :-
We are writing to you with important information about the enquiry you previously filed with us from EASYJET EASYJET LUTON for £355.98.
Thank you for providing us supporting documents. Due to nature of the claim, unfortunately the documentation received could not be used to contact the Merchant and therefore, we are unable to proceed with the investigation. If you still want the cash refund, we suggest you contact the merchant directly as we only act as the billing agent in this scenario.
Please understand that the Merchant may be more responsive to a call from you, their customer, than to our request.
As a result, the amount previously under review has been reapplied to your account balance and you will see this adjustment on an upcoming statement. We regret that the merchant’s response was not as you expected and hope you understand our position in this matter as we at American Express are not in a position to influence the merchant’s policies or T&C.