You don’t have to pay Google anything for optimizing your website to be displayed among the top results. That’s the primary purpose of search engine optimization. Google is a free search engine, yet optimization is a long-term game that can become a challenge.
At the same time, Google can be very strict in how optimization is done. Relying on so-called black hat techniques may get you penalized and even banned. Even at this point, Google will never accept your money to unban you.
Simply put, while SEO on Google is free, it must be done by a professional SEO consultant.