Terminating for no reason

Hello Sir/Mam, I am working as a Teacher in a School run by nuns. I have completed 19 years in school. After every four years new sisters(nuns) take the position of principal & other positions. So, the new sisters aren't liking me. May be i'm Hindu & my co-workers are christian in pre-primary section. The school was State board, but few years before they introduced CBSE too. So, I belong to state pre-primary. As students are moving to CBSE they want to reduce the section of primary to 1 section for each class i.e 1 section for Nursery, 1 section for K. G. I, 1 section for K. G. II. Previously it used to be 2 sections. So the reason they are saying is there aren't much admissions in State Pre-primary so we have to terminate the junior. This is actually not the case, they personally have a problem with me. Can you help me what to do at this stage. I have 19 years of experience, I am the one among all who works hard, rest keep gossiping around. I don't go for gossiping & loose talk, others keep feeding sisters with Gossips & so they like them. I have 9years to retire.