Did you try to contact your Member of Parliament and through him the Department of Foreign Affairs and see if it is possible to bring your brother home on humanitarian grounds. I would suggest to get a letter from your doctor stating that your brother would be better taken care at home.

Al countries have emergency funds for repatriation of their nationals abroad in need. Embassy staff have limited power and not always go the extra mile.

Rules are rules, but they can be bent if need arises.