DISCLAIMER: I AM NOT AN OFFICIAL. I AM ALSO AN INTERNATIONAL GRADUATE CURRENTLY ON F-1 OPT. I FACED SIMILAR ISSUES (NOT EXACTLY THE SAME, THOUGH) TO YOURS AND THIS IS JUST MY POINT OF VIEW AS TO WHAT THE COURSE OF ACTION SHOULD BE, SINCE MY ISSUE WAS RESOLVED PROMPTLY BY FOLLOWING THESE STEPS. PLEASE DO NOT TREAT THIS AS LEGAL/OFFICIAL ADVICE. IT IS JUST AN INFORMAL SUGGESTION.1. For starters, I think you need to contact your DSO (designated school official, i.e., whichever department of your university deals with OPT related matters) regarding this issue.2. They will pryou a contact number for you to place a plea with the USCIS.3. Keep your SEVIS number ready (you'll find it at the top left corner of your form I-20).4. Call the USCIS and voice your plea after telling them your SEVIS number.5. Do all of this preferably in the earlier hours of the day, as the wait times increase as the day progresses. Moreover, the earlier you place the plea, the earlier you'll get a response. Probably on that very same day if you place it before, say, 10 AM your local time.6. I believe the USCIS lets you know a ticket number (sort of like a docket number or a complaint number) for future reference. If they tell you over the phone, keep a note of it. If they send you an email containing your ticket number, retain that email and don't trash it.7. Ideally, after these steps you should know what the status of your SSN card is. If not, I'd suggest you contact your local social security office and let them know what issues you're facing.Hope this helps!