Looking that that new information, you should for sure stick to just the facts, if you decide to pursue this.
Your first line “as you probably already know… i feel like Fiverr should protect…” sounds like straight-up complaining.
You’re not building an essay or writing a speech, you’re reporting an issue.
As for whether to pursue: I’m leaning on the side of ‘just drop it’ but I also understand the ‘I want to be paid for my work’ mentality.
I would agree to wait until tomorrow to send any more tickets, so as to cool down and think a bit more clearly, but rough draft a letter today and you’ll be able to view it with a better mindset tomorrow.
IF you pursue it, keep us updated?