Hire a good lawyer, If you need recemmendation in the Vancouver. I can give you one. We got rejected but he fought the rejection, than got us new court date and won the case for us. MSG me. Cheers.
If things don’t work out, it’s better to leave voluntarily. CBSA will issue depart order within 30 days I believe you should leave or then it turns into deportation order.
But, try to find another good lawyer to help you, good luck