difficult staff

I recently accepted the "promotion" of don at my facility. we have many long term employees. I am a newer RN and have worked at the facility for 3 years. We are faith based and I was promoted for my values. I had to learn the new role while implementing a lot of changes by corporate that the nurses were not in agreement with. We implemented a new EHR, went from 8 hour to 12 hour shifts and stressed our core values of respect and service like was not upheld in the past. Many long term employees are not in agreement with the fact that I am a young don and laugh at our value system we are trying to instill. Yet the stay miserable in their job and will not leave. We struggle with staffing as many ltc facilities in our area are. are their any words of encouragement or suggestions on how to gain respect and flip this place into a productive facility instead of a self centered one. I understand respect is earned and I have tried to do that to no avail. Teamwork is lacking and no matter what motivational speech is given it is laughed at. I came in to this with ideas however the attitudes of the staff has brought it to a hault. I am at a loss of how to change attitudes and feel like the employees are in charge of their own attitudes. I worked in this facility until the promotion as a staff nurse and unit manager and feel that because of this they do not see me as a leader in the position I am in and do not respect this. I have tried to help them out thinking this will gain respect thinking that if I accompany them and assist them with the changes and help them get used to the additional work an changes that it would be beneficial however I feel I am taken advantage of. I am assisting with their work and trying to do mine in the process but not succeeding. I work 18 hour days and still appreciation is lacking. They will take and take. How do I need to change my thinking or aide them in taking responsibility for their nursing duties? it seems they feel medication pass and a few minimal treatments are all they are responsible for