Hello, I need some assistance with changing my Dev Forum username. I am no longer associated with the company/organization that my username is presenting

To solve a problem with my app I submitted a DTS ticket one week ago (13097367) but beside the automated response I received no feedback or help. The ticket is also not listed in the list of DTS tickets in my Developer Account dashboard. How can I check, if the ticket has been received correctly and is being processed? Thanks!