I personally haven't played Ol'West much so im not quite aware of how their system works on staffing but there is a fine line between abusing your powers and joking around with players.
I mean you have indisputable proof here showing this guy abusing you multiple times and that just isn't cool, staff should be there to help and answer your questions. Not spar, pk, etc. Because then they have unfair advantages
Goodluck in dealing with this matter, I hope a representative from Ol'West apologizes for his behavior.