Similar story: a few years back I was interested in applying to TopTal for side work. As a senior engineer working with well known companies, I thought the acceptance process wouldn't be as bad as claimed on their homepage.
Passed the first personality interview. The second was a coding challenge. I said to the interviewer several times I have not studied algorithms, and that if the coding challenge involves them, I would prefer to drop out and not waste time for anyone involved. I was very happy to say that multiple times - I know what I don't know. The interviewer goaded me into taking the challenge anyway, saying I'll "definitely be fine and pass."
The next day I attend the timed coding challenge. Three algorithm puzzles that are in no way insignificant. I had Google at my disposal and still could not solve a single problem - although I came close on one involving permutations of chess pieces.
Unreal. At least Yegor had the good fortune of not being directly lied to by the recruiters!