"We will draw"
When you clicked on the comment icon to get to this discussion, below or beside that icon was a flag or a button that said "Report" (depending whether you are in the web version or the smartphone app). Pressing that gives you report options like "My answer should be accepted" and "The correct answer is unnatural or contains an error".
In the app there is also a free text field for reporting errors in more detail. Sometimes the other options just don't cover the actual problem.