I have a pug and its turned my life into chaos...need help?

I had expressed a desire to have a dog about two years ago and suddenly without warning my uncle gifted me a baby pug about a month ago and it's turned my life into chaos. I'm studying in my final class of high school and need to prepare extensively for board exams which are extremely difficult. Morever, i also take coaching classes and French language classes which consume about four hours daily. Although my parents are most helpful but still as I'm the only child, a lot of responsibility has been put on me and my parents are working. My uncle refuses to take back the puppy as he feels I'm too modest and escaped to his home town in California. The puppy has a lot of needs such as care, food, toilet and play and i feel I cannot study properly for my exams and at the same time do my school work such as home work and tests. i'm afraid that it's been about a month and he has gotten used to the house and daily activities so I cannot give him to someone as he tries to bite that person and runs back to my house which is just a a block away and whenever I put him in a dogcare, he becomes too stubborn and refuses to stay there. At times i get so annoyed when my time is wasted and sometimes wish to kill him. I need advice on how to manage my time. Please help with whatever you can do.