Wrong citation? What should I do?
You honestly attempted to make a citation, but made some mistakes in providing the correct information. This happens sometimes and absolutely is not plagiarism because you were clearly not trying to pass off others’ work as yours.

What you are responsible for is making sure the error is fixed. If the manuscript has not been published then all you need to do is correct the reference in a revision or at the proof stage. If the article has been published you should contact the editors for guidance about the best way to proceed.