Salesforce Loves Downgrading And Escalating My Cases

Every time I submit a case to Salesforce Support I promptly get an email back telling me I have incorrectly classified the severity of my case and that it has been downgraded. I then receive a canned response a day or two later which never solves the problem. My case then gets escalated. This happens every time.

I wouldn't mind the runaround so much if it didn't actually affect my work.