PayPal Software Development Engineer-II interview questions

Applied a month back, got invitation for a phone interview. The interviewer didn't setup the collab edit prior to the interview so took time to set it up. Got 1 easy leetcode question and 1 medium. I could tell the interviewer did not understand my solution and tried to change my code, which would result in a one-off error. I tried to convince but the interviewer moved on to the next question anyway. Did well on the 2nd question. When I didn't hear back after 3 days I knew I bombed. I followed-up after weeks and didn't get a reply. Very unprofessional.