Most likely you have hired scammers. Search engine optimization includes (just could remember right away):

* Metadata.
* Trustworthy of content.
* User experience design.
* Performance.
* Structured data.
* Off-site info and linked date.

If all of this is there, then your website should rank high on the SERP and a blog article (especially one this expensive) is unlikely to have an important impact on your site’s rank.