How can we get the court to add a family member to a conservatorship?

The couple handling all of my mother-in-law's affairs does not keep her son or grandchildren in the loop. They move her, hospitalize her, etc. and sometimes it takes us weeks, even months to find her. Usually threatening to call the police works. She is in a memory care facility, and closest family is 2+ hours away, so having someone handle doctor visits etc is essential, but they do not communicate with us, and do not do anything to help her emotional needs. She is begging me to get a family member added to whatever court docs have kept us out of the loop. We want to be involved/ informed of decisions regarding her care. They now have made it so family cannot even take her out to lunch without permission from the Conservator! Please advise...thanks!