Click on your avatar in the top left of the Home Screen, scroll down to "More" and follow the close account instructions from there.
Have you considered that instead of closing the account, you could:
Change your preferences on how you use the app and Sling Money communicates with you? For example; in your profile settings, you can toggle on and off your preference to be located in the Sling Directory
Unsubscribe to e-mails sent by Sling Money - just click that option in the email
Uninstall the app from your device and re-install & sign back into the account at a later stage.
We value your feedback, so we may ask you for the reason you wish to change your preferences or close your account.
If you would also like to have all your data deleted, please contact us via in-app chat.