I also took with me a copy of the flyer from the organization. Also, if they do not want to give money, ask than if they would donate a prize. Maybe they could donate a free pizza, a free dinner, or a few games of bowling, etc. Than have a raffle. You can find raffle tickets at party or stationary stores.
Grocery stores like to help with free dog food.
They will offer the broken bags and dented cans. My Mother talked to our Church about what happened and they got really involved. The kids can have a car wash and bake sale. The Church can hold a Rummage sale with all items donated from people from the Church or you and your family can as well. My one Aunt made copies of the newspaper story and sent them to a few relatives with instructions to please pass it on to others in the family.