The following is a guide on how to delete a Blogspot Custom Domain:
1. Login to your Blogspot Account
If you have successfully created your subdomain, your next step is to access your Blogspot at the address: http://www.blogspot.com
2. Setting Custom
then select Settings>> Custom Domain
3. After that, select delete custom.
4. After that a new approval window will appear, please click Delete.
Jika nama domain sudah dihapus, coba akses kembali url blogspot Anda tanpa nama domain. Jika nama domain yang Anda beli masih dapat diakses dengan tampilan data serupa, kemungkinan besar browser Anda masih menyimpan cache. Jadi harap bersihkan juga cache di browser Anda.
Good Luck.