>I placed it in proper categories. I contacted Dmoz but no one responded.
You could not have "placed" (or even "suggested") a site in proper "categories" (plural). There is no way: the submittal policy is very specific about selecting the ONE best category.
I'm not sure what you did to contact DMOZ, but editors are strongly encouraged NOT to contact website owners in e-mail or dark alleys -- it just flat isn't safe, even when it might be productive (which it almost never is anyway). And staff is especially unlikely to respond, simply because they're too busy doing the organizational and systems-related work that volunteers can't do.
>Please advice how we can check to figure out where this submission has gone?
There isn't a way to check that. There is nothing further that you could do to help us, even if you were able to check. But there are things you could do to hinder, and we AREN'T going to help you with those.
The usual things could have happened: the editors could be busy deleting duplicative submittals (from you and others), they could have rejected the site for extreme lack of unique informational content, or they could have deferred looking at that suggestion because of priorities.
But what does it matter which is true? At this point, assuming you've checked and it isn't listed, you've read the submittal policies and it isn't guaranteed a listing. (It IS guaranteed a review.)
So, you've suggested a review. If the site is worth listing, sooner or later someone will be grateful for the suggestion. If the site is not worth listing, sooner or later someone would have preferred not to have the suggestion, and a repeat would be even less welcome.
There's nothing more you can do to help; there's nothing more you need to do, to provide the maximum possible help.
