dude,

it is very sad and a complete fault of the college, if what you're saying is true. In such cases, your International Student Advisor should acknowledge their mistake and write to the USCIS clearifying that you were never at fault and request them to instate your status. Once that is done, you'll be back into status and can apply for your OPT. Many colleges, in such cases, when they have a fault, do write such letters to the USCIS accepting their mistakes. So, go and talk to your International Student Advisor about it.

If they have already done so and you have a recepit from the USCIS that they have received your case and are working on it, you do not need to worry about anything, even though the grace period has already ended. The receipt will be your liability as long as your case is pending.

All the very best to you.