There was an article in the Orlando Sentinel about SeaWorld not paying their contractors, and part of the story included the issues with them giving refunds to ticket holders, so you are definitely not the only one having issues (this is not the full article, just the first paragraph and the one about the ticket holder issues) -
A growing number of contractors are pressuring SeaWorld to pay its bills. In Orange County alone, vendors have filed at least 56 liens totaling about $16 million since April, according to a review of public records by the Orlando Sentinel. The disputed contracts are stacking up at other SeaWorld properties including in Tampa and California, records show.
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As vendors say they have stopped getting paid, SeaWorld still charged annual passholders for their monthly installments, according to another lawsuit, while others complained on social media or to the Sentinel they had trouble getting refunds on tickets when the parks closed.
In California federal court, a San Diego resident sued May 8 and is asking for class action status to represent passholders, who she says were charged more than $5 million while the parks closed in the pandemic.
“SeaWorld has made the unconscionable decision to keep charging its thousands of customers monthly membership fees while closing its amusement parks as the novel coronavirus, COVID-19, rages throughout the world and the United States economy has gone into a deep recession,” according to the lawsuit filed by Lisa Kouball, who paid $48.99 monthly for her pass.
SeaWorld declined to comment on the lawsuits.