What really helped me when I started with vim was to disable arrow keys in .vimrc, took me a couple of days to get used to it, but everything was much easier after that :D
For further actions, you may consider blocking this person and/or reporting abuse
Where hackers, sticks, weekend warriors, pros, architects and wannabes come together
What really helped me when I started with vim was to disable arrow keys in .vimrc, took me a couple of days to get used to it, but everything was much easier after that :D