Seasonal staff will have been paid overtime or given the time back (overtime doesn’t have to be at a higher rate but people are not allowed to work extra hours for free).
Breaks between shifts are legally required, must be 11hrs minimum. Also the maximum working week is 60hrs.
That’s obviously assuming you worked there post WTD
It was in your contract (back when I was there) that you opted out of the WTD. This way they could get away with 8:30am-9:30pm days at Fireworks. Valley staff got hit the worst here, as ERT was on Nemesis so we had to be open for 9am. You could tick a box to opt in to WTD, but this would probably mean your application would conveniently be overlooked.
I can assure you, seasonal staff got zero overtime payment. It was a flat hourly rate. The only "Brucie bonus" on 12hr+ days was a free meal at Magic HQ (as it was).