British charity Oxfam on Monday said it was time for concrete action on stumping up aid and not just words and pledges to helpthe millions of refugees from Syria's conflict, AFP reports.

"Rich countries meeting in London this week must commit to real changes that will improve the lives of millions of Syrians," Oxfam said in a report.

"Aid funding and resettlement places offered so far were often so low as to be little more than token gestures," it said. "Syrians in need are waiting for actions not just kind words and promises."