How to stop funeral arrangements if family can not agree?

My uncle died and we wanna hold a service here and send him back to Mexico after that. His estranged sons want him cremated and then just buried without service. They didn't told my uncle brother's anything. Not where his body is right now or that they donated his organs. They did not have contact with my uncle since a couple of years ago. We were his only family. Can we do something about it? Half of the family is still in Mexico and can't come here.