That's unusual. I remember aid groups offering to help Syrian refugees in Turkey and running into all sorts of political problems and Erdogan's stupid stubborness. They would encounter no such obstacles in Greece, so perhaps it's the recency of the situation that's causing the problem.
I don't think it is as much of a neglect reason or that Greece does not want to help, it is sheer number of people coming into Greece and lack of aid to accommodate them. Greece has receive more than 63,000 immigrants from Syria and Libya so far just this year. More continue to come because it is safer to reach Greece by boat than Italy. There are many Syrian immigrants coming into Greece via Turkey, naturally the Greek government blames Turkey for not securing their borders. Dunno if this answers you question.