How long ago was this?
Until around 5 months ago, they didn't really have an official status match promotion, so if they matched your status to silver before that, it would definitely be worth submitting again a request for a status match to gold - because around 6 months ago, I asked them to match my Aegean gold, but they would only give me silver after I book one flight with air berlin or niki, and since then, after the promotion became official,many people have received a match.
So if this match of yours to silver was more than a few months ago, I would advise resubmitting a request. If you think that it would be refused as you have already received a match (albeit to silver), you could open a new account...