In a way maybe they already got the repercussion - their tweet says they were already complaining about Atwell being a Luton fan before the match. They basically accused him of cheating before a ball was even kicked, even though it was far from clear what result was even best for Luton.
It's probably them complaining about imaginary bias rather than actual bias that's lead to those decisions - they've tried to put pressure on him before the game and maybe his attitude was "sod you, I'm not giving into pressure" so he waved away their penalty appeals.
Think the appointment of Clattenburg has massively backfired on them - it implies they think refs are biased against them and if you accuse a ref of that it sort of becomes a self-fulfilling prophecy because they will not react kindly to something like that.