Like Quagmire said, Go to international student office (ISO) and ask them. Did not they process if for you. I think in most schools ISO handles this.

If you have not applied for OPT before and used it, you are definitley eligible for it. Most likely you have missed some documents to send or they were lost during processing. I have never heard of OPT declined before. I think once it is submitted again you will be in status during processing time.