I’m not sure what your expectations are, but if you do not remember what accounts you used to sign up and if you created workspaces by mistake (although this is a multi-step process) it’s hard to help without having access to the customer data and therefore a support request needs to be raised.
If you log the support request from within your customer account, you will then in turn also have access to an overview of the open incidents, but since you did create the request without being logged in, the ticket is not assigned to your account and therefore there’s also no public overview for the ticket. I’d say that this behaviour is also expected from a technical point of view, although this doesn’t help you at the moment.
As said, I tried to reproduce the problem you experienced yesterday with the “Contact Us” form and the error message on the end is invalid, since the ticket is being created nevertheless and I also got confirmed by support that they received your message, so I’m sure they will work on it ASAP, tickets get prioritized due to their impact on customers and maybe having a workspace created by mistake deleted is not at the top of the list, but that’s just an assumption based out of my experience with Mattermost support over the last years; when you need them, they’re here.
Best,
Alex