Paid lingots, but no quiz results?
I took the quiz, but on the last page, it said Duolingo was having problems and I'd have to take it over. Rats! But where IS it?
Something sort of like this happened to me once. If the results aren't showing up on the Quiz History page then I guess it is probably lost, but I suppose it wouldn't hurt to email Duolingo about the situation on the support tab to the left of the screen (though I admit I've never received a response from them).