To change the title of your fundraising page, firstly login to your iDonate account at: https://www.idonate.ie/userlogin.html using your email/password.
From your account dashboard select "Edit Page" on the fundraising page you wish to update. 
From the page editor, select "Change Page Title" from the available options.
Click on the current page title to edit the text and don't forget select Save to save the new page title.