I don't have any other games on the app store, so no duplicate bundle IDs. All the code was written by myself.
I developed a game where you play as as 1 of 4 Healing classes healing a party of 4 adventurers, with a big talent tree system where you can learn additional healing skills. Various boss fights that test your builds in various ways.
I don't feel this design area is saturated, there aren't many games where you play a healer rather than a damage dealer.
I've been working on and off on this game for 4 years, it's not a clone app or anything like that.
I'm not sure how to proceed, because they didn't elaborate on exactly what rule I am violating.