There are several things you can and should do when you encounter a closed question you think should be re-opened:
Edit it. You may think it is perfectly good in its current state, but if there is anything you can do to improve the clarity, then do it! Try to put yourself in the place of a 3rd-party reader, and see the question through their eyes - is there anything that is ambiguous? Overly-broad or unfocused? Some often-overlooked areas for improvement are titles and tags: make sure both are clear, detailed, focused and descriptive of the actual problem to be solved.
Vote to reopen. If you have the privilege to do so, a vote to reopen puts the question on the path to being reopened. 4 other votes are required to complete the job, but a single vote will add the question to review where others may then find it.
Raise a discussion here on meta. Tag it discussion closed-questions specific-question, and state your rationale for wanting the question reopened calmly and clearly. If you make a good case, the community may agree to help re-open the question.
You should do at least one of these three, and in some cases you may wish to do all of them. However, having observed what you did do, I feel the need to also state what not to do:
DO NOT attack the folks who closed the question. It's fine to disagree with others over a matter of policy or perception, but quite another to assume that they acted maliciously. Always strive to assume good faith and others will be more apt to do the same in return.
DO NOT rant and rage. If you're upset, then walk away. Literally - go for a walk. Have a nice cup of tea maybe. Don't come back until you've calmed down and can express your concerns politely and constructively.
DO NOT be in a hurry. It takes time for others in the community to read and review. They have other responsibilities. If you're patient, you may well see the results you're looking for - especially if you avoided the pitfalls laid out above. If you're impatient, then others are likely to take the same attitude with you - or just ignore you entirely.
There's no guarantee that any given question will be reopened. No matter how strongly you feel about a specific case, others may disagree. However, by taking the time to be polite, patient and constructive in your dealings with them, you at least stand a chance of encouraging them to be helpful in return. Therefore, if you care about seeing your question - and this site - continue to exist and thrive, you will heed this advice.