Help, footer disappeared with custom code

I pasted the below code as a block into the footer design and well...it worked. The footer vanished along with the code block.
Now I don't know how to get it back to remove it. Help? 

 

< style>
  .header, #footer-sections{
    display:none !important;
  }
</style >

Oh dear, it looks like you've locked your car keys in the car... you can probably override this by using developer tools and disabling that bit of CSS, can you share your website so I can test if this will work?

17 minutes ago, Ziggy said:

Oh dear, it looks like you've locked your car keys in the car... you can probably override this by using developer tools and disabling that bit of CSS, can you share your website so I can test if this will work?

That would be great thanks
https://www.charlottecummings.nz/
 

Thanks, can you tell me the Squarespace URL, the one that you see in the navigation when you are editing the website, ending in .squarespace.com?

12 minutes ago, iamdavehart said:

no need for fancy devtools, just add "/safe" to the url in your designer and it will stop custom code running. then you'll be able to delete the script block.

so change the url in your browser to "http://whateveryoursitenameis.squarespace.com/config/safe" and press enter.

That was way easier than anticipated. Thank you very much, worked a treat