I have first submitted my article to "Journal of material ..........." (SCI indexed) more than one year before. The first review was a major revision, then after submission of revision, within two months, I have received a minor revision. Which I have submitted within 10 days, before 6 months I have received a positive feedback of article but small changes were still required. Further after making those changes I have submitted the article before more than five months. Now I have mailed twice to the editor (1 month before and 10 days) but not getting any response. What should I do?