Cannot delete WordPress folders

I set up WordPress with Softaculous then realised I needed to do an import instead. Unfortunately, I can’t seem to delete the wp-admin, wp-content or wp-includes folders from the initial installation and I can’t import whilst these are still there.

Does anyone know how I can get these folders removed or do I have to delete my whole account and start afresh?

Can I ask why do you need to import WordPress in Softaclous in the first place? Do you have an existing WordPress installation you want to use or do you want a fresh installation?