ServiceNow Senior Machine Learning Engineer interview questions

Extremely unprofessional interview process from start to finish. Recruiter ghosted me the day of my interview, then the director never showed up. HM was extremely unprofessional and asked vague questions and then got frustrated that the answer was not in the exact format he wanted. Ended up being rejected and only found out because two of my interviewers simply did not show up to my meetings. After calling and emailing both recruiters to understand what happened, they ignored all calls and emails. I am left to assume, of course, that I was rejected from this position. Recruiter screening interview, peer interview -- general technical screening with a Senior Software Engineer, HM interview with a Senior manager, a Director Interview, and finally a Machine Learning technical interview.

Phone Screen followed by 4 rounds (virtual) onsite. Everything went well. A couple of days after recruiter called to extend an offer. Asked about expectations and explained benefits provided by the company in detail. Said they would get back with a formal offer and then got completely ghosted. No response to email or text.