site size after removing cache plugin

Hi, a few days ago, my site was very slow, so I contacted the hosting provider, and they shared a few things to do, which I did. One of them was removing WP Rocket and installing the LiteSpeed plugin; it was just a suggestion, so I followed their advice. However, later I found out that the issue was on the server because the CPU load was around 43%. When my site returned to normal, I removed the LiteSpeed plugin and reactivated the WP Rocket plugin. Here, I faced another issue with the site size. Before deactivating WP Rocket and installing LiteSpeed, my site was 18 GB. But when I deactivated and removed LiteSpeed, reactivated WP Rocket, and created a backup, the site size reached 29 GB.

Please suggest what I should do now. It seems like the LiteSpeed files are still stored on the server and were not removed after uninstalling the LiteSpeed plugin.