There can be multiple reasons why you don't receive Slack call notifications when a call comes in or is missed:
Please check the following list:
Are you in full-screen ? If yes, you'll have to reduce it because this blocks Slack notifications.
Has the "ottspott-bot" been invited in the "ottspott_calls" channel ? Please check it :) => Go to the member list and see if the "ottspott-bot" is visible. If not, please invite the bot directly.
Are Slack notifications enabled inthe Ottspott back-office ?
=> Go to the Ottspott back-office, "Dashboard", "Slack notifications" section and check all boxes or the notifications you wish to receive.
Did you enable "Silent Call notifications" on the Desktop app ? If yes, please uncheck.
In case the notifications still don't show, please contact us via the chat widget or email us at email@example.com.