Hey, Don't be upset. These things are part of business.
You have completed the offered work, and for that, you should be paid. You can contact support for help, or if you get a negative review, report it and ask support to remove it. They mostly check such things manually and resolve the issues.
as you said
Pest or cholera. What poison should I take?
Whatever, at least get paid for your hard work. 😄😄