Dazzling Call to action

Hello,

I have this call to action that when i go to customize and try and remove it or change it, it does not allow me to do this. It keeps reverting back to the one that it already has.

I have just inherited this site and would like to changed ASAP. I am going to have to unpublish the blog until i can sort this out.

thank you

The page I need help with: [log in to see the link]