I purchased an Orielly pack for a 3 star monster and 2 x runes and only got a zero star orielly

If you got two Level X runes and a Rank 0 O'Reilly, you might have bought the $25 pack, as the rewards you said you received exactly match that offer. If you're on Android or Amazon, there will be a purchase receipt sent to your Google/Amazon account email (Haven't used iOS so not sure). If the price was the amount of the R3 O'Reilly pack, I reccomend taking a screenshot and contacting in-game support for it.

@clay-coletta send a ticket to Support with the receipt as a proof