Fiverr isn’t an e-commerce website or design to handle transactions.
It is merely a message board. It doesn’t not require a buyer to pay before he save an attachment. Unlike, Amazon - a transaction website - which requires you to click the buy button before you save or download the digital Intellectual property. And they have no rejection button. Fiverr needs to incorporate that into their system.
That’s why sellers like me are getting exploited by malicious buyers. Customer service is no help. They will tell you we can’t make a buyer accept your work. But the buyer did accept the work. He only nominally rejected it. Nothing stops him from using the attachment he had saved. And cancellation only charges the buyer a fee. But no fee goes to the seller.
Fiverr runs like a lemonade stand.