02-18-2016, 07:08 AM
Recreate the sitemap and submit it. Have you checked the backlink profile. It may happen there are some links that can hurt your rankings. So, check it and get rid of it. Also check whether there are old content on that domain which are indexed previously. If yes then they will show 404 error to those pages. I have seen that many webmasters build content on that page in intention to get traffic quickly.
"IF YOU CAN'T MAKE IT, FAKE IT"