I have already memorized the lesson that in a critical situation with sewer and plumbing, you need to have the contacts of a reliable and professional team of plumbers in your phone. For me such a team was etobicoke plumbers https://www.antaplumbing.com/plumbing-etobicoke . They helped me out 2 times in critical situations when the sewer burst in my house. They came quickly and promptly did everything possible to avoid a big flood. So I highly recommend this team if you haven't found a regular plumber yet.