what aid group said that?

From the article:

Eight international aid groups, including Oxfam and Save the Children, said in a report that Israel had failed to meet the demands by the Tuesday deadline.

If you want the full list, though:

Signatories
Anera
CARE International
MedGlobal
Mercy Corps
Norwegian Refugee Council
Oxfam
Refugees International
Save the Children

Source: https://www.nrc.no/news/2024/november/joint-statement-israel-receives-failing-grade-on-u.s.-demands-in-gaza (this page has the full text of the joint statement and a link to the full report)

Hamas infested unrwa

UNRWA - the organisation that Australia, Canada, Finland, Germany, Iceland, Norway, Japan, Sweden and the European Union determined they should restore their funding to after investigations into allegations were concluded - were not one of the aid organisations referred to by the headline, no.