Lovely, I also got the standard response when trying to email my ticket and copy of BP:
Dear starflyergold,
Thank you for your e-mail.
In order to claim missing miles you need to follow the process listed on our website. Please log in to your Diamond Club account and follow the link 'claim missing miles' on the members' homepage. You need to complete the form and send us your boarding passes and ticket/receipt for us to process your request. The address you need to send this to is as follows:.......
We can credit any flights that you have taken within the past 3 months provided they were booked on a eligible partner and bookings class. To find more information regarding eligible bookings classes please use the following link:
Get real people in DH, what on earth could be wrong with email?
Told them to have a look at their T&Cs about the 3 months before emailing people.