Varys Capital interview questions

I received an email with links to two parts of the assessment. There were two parts. The first one contained three questions. As I have found later, two of them were 1:1 copy-pastes from leetcode. The second assignment's definition was incorrect though and contained several ambiguities. I explained very politely in the email after my submission what was wrong about the second assignment. I have not received any feedback whatsoever. So, still hoping, I jumped at the part two, because the email stated I should finish everything in at most five days. After finishing the second part I asked if I should submit it too. I got no response in the promised time frame (five days since receiving the first mail). After a week I received two sentences: You failed part one, we won't evaluate the part two. They provided no explanation on the discrepancies in the assignment nor they explained if and where my solutions were failing (I am very confident about my solutions, I tested them very thoroughly). I've spent several hours of a focused time solving the assignments, I pointed out insufficiencies in a friendly manner and they didn't even bother to respond in time (responded in a week, although 5 days was the deadline) - although they were encouraging me in the email I should reach out to them in case of troubles. I replied again, kindly asking for the explanation of the second task. No response... I consider this behavior very disrespectful and I'd say it's even quite childish not to admit such an obvious mistake.