People have won, but you need to have strong H&C consideration. Having a failed refugee claim alone isn't enough grounds for an H&C application. How long have you been in Canada? Have you deeply established yourself here for example are you very active in your community and have you done this for some time (above and beyond what would be typically)? Any family members here? If you're not sure how to put together a strong case then you are better off working with a lawyer. Good luck.