None of her friends treat her right?

My friend found out 3 weeks ago she has a tumor in her kidney. She only told me and not her other friends. Her other friends do things like when they get the mail they leave hers in the mailbox and don't bring hers back for her. They also eat her food and leave the kitchen a mess for her to clean up. They don't even know she's sick and I don't think they would care anyways. Some days she can't even get out of bed. She has surgery next month. I feel bad but her friends are jerks and they just don't care and she deserves to be treated better. Is there anything I can do really?