If your question was deleted then it would have, before being deleted, been put on hold for a number of days—specifically to give you a chance to improve your question to a state where it can be reopened. If you edit your question while it is on hold it will automatically be entered in to a queue where users with sufficient reputation will review the question and decide wether to reopen it or leave it closed.
If you are unsure of why your question was closed or how to improve your question you should reach out to users of that specific site. Regular users of the specific site you are asking on will be familiar with what is and isn't on-topic and what is considered a good question.
Comment on the question itself asking for clarification and guidance (you can @reply to anyone who has previously commented to notify them).
Assuming you have sufficient reputation (20) you can ask in that sites chat. This is the best option as you can discuss the issue without being limited to a Q&A format or comments.
Bring the issue up on that site's meta—explaining why you disagree with the closure. Ask for guidance and clarification but don't be confrontational, you're unlikely to get much help by telling people their decision was wrong.
Asking here with no reference to the question isn't going to get you very far—the only thing anyone here can tell you (without knowing the specifics) is: Improve your question. Reposting the same question in the same state it was before it was closed isn't going to go down well. It will certainly be closed again and will frustrate users who saw it the first time round.
So in future, improve your question before it gets deleted. In this case, ask the question again only if you can clarify and improve on the original.
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