From support.atlassian.com, I navigate to the Contact Support page. To start a new issue, I have to select the product it's for from the dropdown. In this case, that's Bamboo Datacenter, which is not listed. In fact, Bamboo is not listed on either the Server or Cloud/Datacenter tabs.
What's going on here? Bamboo keeps breaking in new and frustrating ways and now I can't find a way to reach support about it.