Communication is key, both parties need to work on that. The moment that you started feeling uncomfortable at your school you should have talked to the instructor. Even after you got injured you should have spoken to your sensei. I think that if you really want to continue in your training at that school you should try to do something respectful towards him. When my instructor was training he got kicked out of his school for whatever reason and he came back to every class for 4 months kneeling in front of his sensei's office door asking to be allowed back into class. He would sit there for the whole class. Just a thought. I guess it depends on how bad you want to go to that school.