Okay, have your parents talk to them - some people don't give any credence to anything a child says. I am serious - have your parents talk to them, as this situation seems to be snowballing out of control. Find out what the actual laws are regarding pets in your twon, make sure you aren't in any way violating them. Then, if the adults cannot reach some understanding, they might talk to someone about mediating this whole situation before someone, feline, canine or human, gets hurt.