Hello, as @Aqib indicates, the template|theme can be customized to your liking.
they can add or remove whatever they want but they must have basic knowledge about html / css / javascript, they can modify or create a theme by editing the files that are in the temas/default folder the page of the main section where it shows plans and prices is the file principal.tpl and some of the modules that go on the left or right side are in the modulos folder.
The other files are each separated by categories such as css, js, images, etc. each separated in their folders that can be modified to tas