Collabera Software Developer interview questions

My recent interview experience with Collabra digital was quite disappointing. I went through [2] or [3] technical rounds and a client round, successfully clearing each stage according to the feedback I received. However, after the final round, all communication ceased. I haven't received any feedback, and despite following up, there was no response from the company.

first they called take the telephonic interview and after shortlisted they schedule the virtual round after shortlisted they will schedule l2 for same and after hr and client rounds are there