I submitted a paper to two journals, and the first published it, but I agreed to publish in the other; what can I do? I submitted my research paper in journal X on 7th July, 2014. Journal sent me one thanks email immediately. After that I waited for one month for any response from editor but nothing came from editor side.

Than I submitted my paper in other journal Y. My paper was accepted in that Journal and sent for review from editor side.

At 30 August, 2014 I received one acceptance email from the editor or journal X that my paper has accepted and I was asked to submit publication fee of 90$. But I could not reply this email due to busy schedule and I was also not interested to publish my paper in journal X. After that I could not receive any email or revision or anything from this journal X.

I continued to work with journal Y, modify paper according to reviewer comments, sign copyright agreement and now paper is in publication phase.

Yesterday, by chance I open my Google scholar account and find paper that was published in journal X to whom I was not interested and who was demanding 90$. When I checked the online paper, I was astonished that the journal published my paper in its July issue and date of publication was 1st July, even I send this paper on 7th July and journal X notify me about acceptance and fee payment on 30th August.

How its happened that Journal X published my paper without my consent and published it in back dates. Now what I should do because the same paper is in final publication phase in journal Y to whom I have signed copyright agreement also. Please guide me tell me any forum to raise voice against that journal X. Because I send many emails to editor of journal X but receiving no reply from editor side. Any penalty or any other thing which I can do.
The fault here is yours.

You should never have the same paper be submitted in two different journals at the same time. This is an absolute rule that protects both you as an author and the journal as the publisher from duplication of effort, as well as avoiding situations like this.

If you had wanted to stop the publication in journal X, then you should have sent them a letter clearly retracting your submission. This would have ended the process at journal X, and allowed you to submit the paper to journal Y with a clear conscience.

Now, however, since the paper has been published by journal X, you are stuck. If journal Y publishes your paper, you will have the same article published in two different journals, which is also a violation of ethical standards, and could lead to both copies being retracted by the publisher. So, unfortunately, you are stuck paying the fees to the journal X, and the work you've done to improve the paper with journal Y is now "lost" to the literature.

As has also been pointed out, journal X appears to be quite sketchy, and I would avoid any future contact or involvement with them. But for now, consider this a lesson learned for the future.