Yelp Software Engineer interview questions

First they shared a online coding round test - had a timed Code Test via HackerRank and then there was HR connect for introduction, then there was a Phone Interview with an engineer from Yelp which was basically a Behavioral interview, and then as part of last round there were 4 back-to-back rounds- one behavioral round and three technical rounds (two Problem Solving + one System Design). All three technical interviews were conducted via HackerRank. After these gruesome rounds, the feedback was positive and the recruiter also mentioned the possibility of joining Yelp and described the next steps in detail. They mentioned the feedback would be given by 1-2 weeks, But there was a long delay on their end and at the end the Recruiter emailed: "Some of our roles have been filled in the meantime so I'm in touch with different hiring managers to see if we can find a spot for you on one of our teams here in Europe. I'll get back to you as soon as possible!" ---> Then there was no response (its been 6 months) despite following up many times. Very unprofessional on their part to keep hanging.