The is no feature to delete an Account, however the system will purge all your Recordings (Voice & Call Recordings ) after 90 days if no payment made for the account.
To stop using iReCall App. logout on the app to stop recording
You can delete the App.
After 90 days all your recordings will be deleted, once they deleted you can not retrieve them again.
The will be a notification send to the email address.
Anytime in the future you wish to use iReCall you can , download the app and use your old login credentials.