To change your daily rates, log in to your account, then click on the "My Profile" icon (the second icon down on the left of your screen), and then click on "Settings".
You can also use these links:
You then have the option to choose between the service that you want to modify, GoWalk, GoNanny, GoSchool or GoHoliday. Click 'MY PROFILE' under the one you want to change, and this will bring you to the screen below. You will be able to modify the price you charge.