Not sure what you are asking. You can’t be committed to two schools at the same time.
So if you don’t de-commit to school A in the window where you can still commit to school B, you will have to go to school A, because you missed the deadline to accept your spot and put down the deposit at school B.
Continue to work on your grades so that this does not become an issue with your dad. I also encourage you to continue to discuss these things with your dad. Good luck.