I can't do any more than provide the contact details.
Surely worth a try to contact and get your documents back though ?
I have to agree the Embassy is terribly slow in communications.
Well, I make no apologies but, here are the details to 'up-the-game' a little and escalate your valid complaint:-
(Please try)
Stephen Lillie - British Ambassador to the Philippines
Trevor Lewis - Deputy Head of Mission, British Embassy Manila
Email: ukinthephilippines@fco.gov.uk
Telephone +63 2 858 2200
Fax (Management) +63 2 858 2237