TL;DR: If you make a contest where people get to vote online fucking make it right!

And here's the story: I play in a local coverband to make some cash on the side and because I love making music. We entered a contest hosted by a local radio-station. The first round was determined by judges and now 5 bands remain and of those 5 only 3 get to be voted into the final round. In the final round every bands wins something: 3rd place 250€, 2nd place 750€ and first place 5000€.
Now that stupid dipshit of a web-designer of that radio-station made a website where you can vote and it only fucking sets a cookie. You can delete it and vote again. You don't need no E-Mail and nothing. It doesn't even block multiple votes from one IP. It doesn't do shit.
Even my bandmates (who don't work in IT) where smart enough to figure out that you can just delete the cookies...
I think that now every band except for one is cheating. (we have over 5000 votes and combined all bands have like 4000 FB-Likes and sometimes and Band gets like 400 more votes in an hour) This is such a fucking messup and I don't know what to do. Maybe they'll look into stats but if they're so stupid to make a contest like this in the first place, maybe they won't. And even if they look into the stats it wouldn't be fair to kick out a band with much votes because how the fuck would they know if the band themselves cheated or if it was a fan of the band or even an enemy of the band just to get them kicked out.
I'm afraid of talking to the radio-station as a part of one band because maybe the web-designer there just gets frustrated and bans us from the contest entirely.
This is just fucking frustrating.