Contact the Student Helpdesk at 416-287-4357 or studenthelpdesk@utsc.utoronto.ca AND take screenshots of your issue that include the date and time.
Email your course instructor and TA (if your course includes one) immediately with the unofficial copy of your answers. If you have lost internet access, write your email and take a screenshot that includes the date and time. Send the email as soon as possible. Your course instructor will decide whether to accept the late submission.
If your course instructor does not accept a late submission of your final exam, you may submit a petition via eService.