If you want to remove a Hootsuite account, you can easily do that in the Settings page of your account.
I’ll show you below how I managed to close my profile using a desktop computer:
1 Go to Hootsuite.com
and log in by entering your email address and password on their website.
2 Select Settings in the left menu > Account
3 Scroll down to the bottom of the Profile tab
and you will notice an Account removal link at the bottom.
4 Last step – Tell them why you are closing your account
and hit the Delete account button.
✅ Result
You’ll be logged out automatically and your account has been cancelled. Mission accomplished!
Source: hootsuite.com