Here's how to change your mail account password at iSurf.
Step 1: Login to webmail at webmail.isurf.ca
Step 2: On the top menus, go to Others → My Account → Password
Step 3: Fill in the details - Old/Current Password and then the New Password twice
Watch for confirmation or error status message in the lower right of your browser.
Now log out (Top right corner icon) and log back in again, and you're golden!