Good evening. I think you can call emergency plumbing help. Or you can find on the Internet contacts of plumbers who are closest to your place of residence. I also had a flood in my kitchen last month. The pipe burst at the exact moment when I was not at home. Thanks to the neighbors for quickly reacting and calling a technician from this company https://pomplumbing.ca/backwater-valve-installation-scarborough/ . You can contact them, among others. I didn't pay a lot of money back then. And I also saved their contacts, just in case.