How to get your parents to get you anything you want?

Well it all depends on your parents. and honestly you parents sound tough. By the details you wont convince them with that. got to give them an ultimatum. my parents are the same way. your parents r tough nuts. you have to prove it to them somehow. ask them if there is a way you can prove to them that you can handle a pet if thats the case and (idk if it has something to do with age or what not). also make sure they are not allergic or anything that might be another reason why they say no. medical problems