MY PARENTS ARE FORCING ME ...

Hey guys don’t mean to take much time of your day , but HOW DO I TELL MY PARENTS I DON’T BELIEVE IN THE SAME RELIGION THEY DO ??? It’s getting really annoying that they forcefully make me go to church every Sunday ! Make me help the priest during the mass and are even making me attend DAYS retreats ( retreats that are longer than a day ) ??? I can’t put up with this anymore ? Am i at wrong ? Or are they ? What do i do ?