I think you have anger issues here and justifiably so - it's not nice to make fun of you like that. I think someone needs to nicely speak to your father. You can also learn how to channel this anger into constructive assertivenss - sticking up for yourself respectfully. You can also learn deep breathing exercises that will calm you, so that you can react assertively, instead of becoming angry - which is destructive to you and others. Best of luck.