First, you should read closetnoc's comment under your answer.
You might consider using this route since actions have already been taken. This should speed up your wait period to show up on both Webmaster Tools and Google search.
Furthermore there seems to be no way to resubmit the individual sitemaps themselves.
Submit the individual sitemaps in your Google Webmaster Tools console.
Make sure all the sitemaps URLs in the sitemap index file does match the sitemap location.
Submit sitemap index file to Google as you would a normal single sitemap.
Good way to show search engines that you have or have not submitted sitemaps to as Google suggest.
Insert the following line anywhere in your
robots.txt file, specifying the path to your sitemap for each sitemap and sitemap index file.
let google know the sitemaps themselves have changed significantly
A sitemap can be asked to get crawled again and is the good method for existing sitemaps:
Ask Google to crawl and index your URL
- Click Submit to Index, shown next the status of a recent, successful
fetch in the Fetches Table.
- Select Crawl only this URL to submit one individual URL to the
Google for re-crawling. You can submit up to 500 individual URLs in
this way within a 30 day period.
- Select Crawl this URL and its direct links to submit the URL as well
as all the other pages that URL links to for re-crawling. You can
submit up to 10 of requests of this kind within a 30 day period.
- Click Submit to let Google know that your request is ready to be
So again as mentioned by closetnoc, it is not necessary to resubmit the sitemap itself, but rather ask for it to be re crawled.
Also look at your crawl rates in your robots.txt. A Lot of new pages can slow your site down. So either set it to crawl at certain times (WMT) or place a crawl delay (robots.txt.