Honey, sorry to say there are no refunds at this stage.
If he's in permanent salaried employment why didn't he get paid for those 2 weeks in June ?
Did he take unpaid leave ?
Based solely on the information you've shared I can't give you false hope.
However no harm in contacting UKVI Manila and try to defer until December.
Just explain what happened and ask.
Try this e-mail:-
manilvisaenquiries@fco.gov.uk
Try as many as you find.
Here's a possible if still there:-
Ms B Pastolero - Appeals and Correspondence Manager, Manila Visa Hub
Another possible chance if still around is:-
Aileen.Cruz2@fco.gov.uk
Chin up Honey