Board Thread:Tapped Out Help/@comment-104.53.140.78-20150319011803/@comment-26143371-20150319112702

From your description(the wrestlng match) I would guess you have completed "The Real Investorettes"(there is no page for it, but I hope I'll be able to do one soon) instead of The Investorettes questline.

You most likely haven't completed Money vs. Milhouse Pt. 5 and thus not yet unlocked The Investorettes Pt. 1. So keep looking for Luann Van Houten's icon in the taskbook and do these quests.