Sure, here's a more polished and professional version of your message:
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There was no proper process—it felt like a complete waste of time. I received a call from the HR department two days ago, inviting me for a face-to-face interview. I went to their office and ended up waiting for over an hour before the interview began.
Initially, a senior person asked me some questions related to my skills and project experience, which I answered confidently. However, to my surprise, they then handed over my resume to a junior developer who clearly lacked the experience to conduct interviews. She seemed confused and unsure about what to ask, and I was taken aback that a junior developer was interviewing a senior-level candidate.
Later, they claimed that my code was incorrect, which was quite surprising. Overall, the process was unorganized and unprofessional.