My Twitter account disappeared

I'm hesitant to essentially ask for technical support here on HN, but there doesn't seem to be any way for me to contact twitter about this issue, and normally the public form to ask for support about this issue would be — well, twitter...

Today my twitter account simply disappeared. I found out when keybase notified me that it had found that my existing proof of twitter account ownership had been deleted. I tried logging in and failed to do so, and when I looked at my public profile https://twitter.com/adrusi it 404'd. This is not an account suspension because that would look like https://twitter.com/nero, and it's not a case of a deactivated account because logging in is supposed to automatically reactivate according to twitter's support https://support.twitter.com/forms

I'd be interested to know if anyone here has been affected by this same problem, or if anyone knows a way to contact twitter directly.

Edit: it seems that it I can access it through my linode VPS and my friend can access it through his VPN, but it fails both on my home internet and on my cellular.