Hi Lydia-
Thanks for reaching out, I’m sorry to hear about the frustration removing the Attribution links.
If you have a BoldGrid Premium license, you can remove the footer attribution links in you Customize > Advanced > Footer menu.
I checked on your account, and it does look like you have two license keys, one Free and one Premium. You may need to make sure that your site is using your Premium Key. Log into your BoldGrid Central Account and click on Connect Keys.
Once you’ve copied your Premium Key, head back to your WordPress Dashboard and navigate to Settings > BoldGrid Connect and click on Change your Connect Key.
Once your site is using your Premium Key, you’ll be able to remove the links from your footer from the Customizer.