JACKSDOUGH

Got to stage 6 on spamalot jackpot game. It clearly states if I get to here I will have to choose from 2 items and WILL win one of 2 jackpots. Support has since told me jackpot is not guaranteed. Do they make the rules up as they go along. It does not state anywhere that it is not guaranteed. Just that if I get to stage 6 I WILL win 1 of 2 jackpots. Who can I report this to?? Thanks