Your account can get suspended either because your trial period has ended or if the payment was not successful while processing the renewal.
You cannot update/respond to tickets. If you are an Agent/Supervisor/Admin, you will see this error message: 'Limited access: Your account has been suspended. Contact your account administrator to reactivate'.
Account Administrators will see this error message: 'Limited access: Your account has been suspended. Click here to pay and reactivate'. Clicking on 'here' will take you (Account Administrator) to the Plans & Billings page inside your Freshdesk account.
Alternatively, you can email support@freshdesk.com so we can route you to the Billing team to get your account up and running.