How to stop people from asking for duels?

I don't know if duels = PvP in this game.. But, it gets annoying when well you know high levels (from the looks of it: glowy weapons, big mounts, and big genies that have different colors than the 4 original color of genies) challenge someone who wears Sirius Arcane Robe (level 30-).. Also, I thought PvP only starts from level 30 when you have the option to go into PK mode (white color name or red color if you kill alot of people) or remain in blue color (PvE mode)..

Maybe there's a way to block duel thingy from keep up from popping in my screen?

Duels aren't PVP and you don't lose exp or items when you duel and die. But, yeah it's annoying and I don't know how to set it so you don't receive duels.

LoL ok.. But still though, if I wanna duels, I only duel with friends and/or guildies..