Hi.
I created custom event, then removed it.
In my events list this events is not displayed - that is expected.
But it still displayed on my dashboard. When I clicking it - it returns
me 404.
Could you please check and fix this issue?
I've had a good rate of success using the Garmin Support site. From there you can initiate a chat, look up the phone number, or fill out the email web form.

Personally, I prefer chat, since it is more immediate and you'll have a transcript of the conversaton.