My site cache is not clearing even after purging cache several times on cloudflare

I removed a plugin from my site, the name of the plugin is Mystickymenu, and it displays the purple bar at the top of my site with the writeup “Join Our JAMB 2023 WhatsApp Group”, but I have removed this plugin and the bar is still there, also, I changed my nameservers and waited for up to 1hr, the site never went down, it was still online, I have purged cache more than 100 times, nothing happens.