submission review is taking too long I have submitted an article for a journal in which it was stated that the review time was from 80 to 120 days, that is approximately 4 months at most. The submission of my article was approximately 13 months ago and I did not get any answer in the allotted time they mentioned. I sent an email to the editor after 8 months and I was told that the review process has suffered a delay, but that they soon will fix that issue.

I waited until September and sent another email and again I got another reply of an apology and nothing more. I believe that it has passed too much time, until now it is almost like one year, so I do not what to do.

Would there be any problem if I submit my article to another journal or should I send another email to the editor of this journal? Or rather just wait until I get a response?
It seems like a long time by any standard. Contact them. You can give them a date by which you will formally withdraw your article from consideration. Maybe a couple of weeks. If they don't jump you can submit elsewhere without worry. 

The final nudge is just a courtesy. You could actually just inform them that you are withdrawing for submission elsewhere. But if the journal is reputable it might be worth the courtesy.