There is a new function in the main menu under Administration → Company Setting - Company account deleting.
The function has the following limitations:
Company account deletion is available ONLY to the company owner (other users will see a message about the inaccessibility of this function).
Account deletion is not possible if the client is on a paid plan and has overdue bills.
Account deletion is not possible on a postpaid tariff - you need to switch to a free plan first.
If you confirm the deletion of the company and there are no restrictions described above - the account is deleted immediately and will be unavailable to the user when they try to log in. The user currently has only three months to make a request to restore the account, after this period it will not be possible to fulfill the request.