I think that to get a re-vote, you would have to show some form of active electoral fraud. If the spoilt ballots were shown to be otherwise almost entirely votes from one party, or all to be from one particular area which would tend to vote in a particular way.  If you just showed that a percentage of voters were confused by the ballot papers, then the courts aren't likely to go for it.  After all what party would want to go to court and claim that their supporters are unfairly disadvantaged because they are stupid?

Any idiot can face a crisis - it's day to day living that wears you out.