I haven't used that particular theme, but if you go to Appearance -> Customize, once that loads at the bottom of the left bar there should be an 'Additional CSS' option. Place the cursor css in there, and that should work.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
I haven't used that particular theme, but if you go to Appearance -> Customize, once that loads at the bottom of the left bar there should be an 'Additional CSS' option. Place the cursor css in there, and that should work.