I placed several backlinks orders on Fiverr with specific keywords, where I get so many spammy backlinks that forced me to submit disavow file. After one day of submission, I noticed that the web page is on the first page of the Google sometimes. In the evening, I saw my link is not available even in the top 100 hundred results.
What is the reason behind these fluctuations? Why does my web page suddenly appeared on the first page of Google?
Previously, I thought that my website is penalized by Google, but later, I saw that my website seems fine.