First of all, I think this is not possible to delete the WordPress account completely But anyhow we can easily update the blog address, username everything But can’t remove us from WordPress Blog permanently. Moreover, Let’s try our best. So Let’s start:
If your site has any Premium or Business Plan, Custom Domain, Domain Mapping, Premium Theme or Any other upgrade, you will need to remove them first.
See Deleting a site with Upgrades for more details.
Then You Need to Empty your site by following the instructions on this page. Then Go to Next Step.
Then Go To MySite(s) > Settings
Scroll Down To The bottom of the Settings Page, Then Select Delete site
(Note That, This Site deletion Is Permanent)
Now You see Export Content. This option Says Your Site to export as .zip as your sits data. Once you delete your site, this content won’t be recoverable, so it’s smart to export the content to a .zip file before going Next Step.
Once you have exported your content, scroll down to find the Delete Site button. If you have multiple sites on your account, be sure to confirm that the correct site address is listed in the yellow alert bar. Again Sure your Select correctly
Then Confirm the deletion. Enter your WordPress website address of the site (shown in red) into the provided field, then click the Delete this Site button
This is the final step – once you click Delete this Site your site will be permanently deleted.
Now You Can check Then you will see a message saying that your site is no longer available and has been deleted.
This topic Also helpful for those questions:
How to delete a WordPress account permanently
My Others Written you can check:
Top WordPress Tips You’ll Love To Learn
The Top 1 (One) Best BuddyPress Kleo WordPress Theme
2018’s No.1 Best Corporate WordPress Themes for any business website
If you have any further question Please comment, I will try my best. Thanks