How to make checkboxes more obvious

I have a few checkboxes on a page which are checked by default. The users do have a choice to uncheck them if they like.

However, in our user research so far, the users seem to have missed the fact that there are checkboxes on the page that they could uncheck. Is there a way to make this more obvious for the user?

The checkboxes could possibly not be 'above the fold', and the user might need to scroll down to see them. This would always happen on a mobile screen.

I have attached a mockup of the page for a better understanding: