As a general policy, we will not cancel your account for you. We want to make sure that requests to cancel accounts are legitimate. The best way to cancel an account is to have an administrator on your account go through the "settings" navigation within the application and cancel the account.
If you have a situation where the admin has left your company or otherwise cannot cancel an account, let us know and we'll attempt to help. In this situation, we will attempt to get some confirmation that we're speaking to the right company beforehand - we won't just cancel an account based on one request in the help section.