How To Resolve Instant Indexing Problem?

Hey Guys, I have been facing issues for more than a month and the issue URL of my money sites and other back Link (URL) are not getting indexed which used to get index on time after crawling them in Webmaster. Please help me out. I am in deep stress as my site is loosing ranking day by day just because the URL are not getting indexed by Google Webmaster. I need instant indexing as I used to do normally back then. What method you suggest. Waiting for your reply.

There is no method that works at the moment.
https://www.blackhatworld.com/seo/indexing-with-submit-to-google-the-end.1012563/

There is no such thing as instant indexing. If they don't index, they are probably crap.

Yes, a thing like instant indexing do exist. If you don't know. go and do some research. and stop selling spam links.