Dear Gunnhill,
Thanks for your comments. Here are mine after checking.
You booked a non refundable ticket to Splash Water Park and wanted to change to another water park the day AFTER you supposed to go to Splash Water Park.
Splash Water Park were expecting you and you failed to show up. It was only after you told us you wanted to change once Splash Water Park had charged us and advised your never showed up.
We are happy to change tickets wherever we can, but you have to let us know before your booked date and not after. We are always happy to assist changes to all guests without charge.
Thanks,
Nick