H1B says still says submitted

My H1B case still says submitted in July, and I am trying to get my case receipt number so I can apply for an extension. However my boss called USCIS, and they said they couldn’t do anything and to call the Department of State who said the same thing. My OPT has expired and I don’t know what to do.

Typically for someone switching from F1/OPT to firsttime H1B will also apply for cap-gap which if approved will auto-extend your OPT EAD so tou can keep working till your H1B kicks in on 1st October.
You need to discuss your situation with your employer and their immigration lawyer. Also keep your DSO in loop.