You can still log in using your email address. Once you’ve logged in, you can change your phone number. Click on 'Profile' in the Bringme app, then click on 'Account', and change the phone number there.
If you don’t have access to your email address either, please contact our Help Center to have your account deleted. Ask your admin to add you as a user with your current email address or create a new account with your current email address.