If you want your donations to go the farthest, I recommend donating directly to people in need and local nonprofits. For the humanitarian crisis in the Democratic Republic of Congo, I suggest Goma Actif
Goma Actif is a Congolese nonprofit that has boots on the ground in Goma, DRC, at the Kanyaruchinya displacement camp, providing food to people who have fled the latest offensive by the M23 rebel group.
The Congolese people have expressed frustration that international organizations are slow and fickle when it comes to distributing aid. Goma Actif functions entirely within DRCongo and therefore bypasses international red tape to deliver aid more reliably than external sources.