Uber Software Engineer II interview questions

I applied online and the recruiter reached out to me to schedule an interview. The recruiter asked to send some availabilities for the next 3 days and also schedule the call using a link (yes, she said to do both). She did not have any availabilities for the next 2 weeks in the link she sent. I asked her what to do, and I got no reply. So I sent her out my availabilities for the following 3 days and also scheduled the call in her calendar after 2 weeks for the first available date. I received an automated calendar invite which she later changed without even asking if I would be available. I sent her an email saying the new scheduled date would work for me. 2 days later she cancels the phone screen invite, for which I emailed her asking for the reason and also expressed how interested I am in working at Uber. She did not reply. I hope she does not do the same with anyone else and play along with the interested candidates. I have seen many recruiters not replying, and I understand them not replying, but this is a very unusual case and frustrating.