I know what I want, but what would you do?

My grandparents are paying for my college. I went to a school away from my semester for one year and successfully completed a semester of cles. I went back my sophmore year and I flunked the semester due to a mental illness episode. I got medicine since then and came home to my hometown college and have successfully completed 4 semesters. I have like 2 semesters left. I want to go back to the college I started at because it is a nicer college. My grandparents said if I go back to the nicer college they will not pay my tuition and appartment. I am stubborn and I want to go back anyways. My whole family is telling me to stay here at my hometown college but I don't understand why they won't agree with me. I just really want them to support my decision to back but they aren't