NEXT Developer - HR Tech interview questions

I received an invitation on Hackajob to interview, which I accepted and suggested some times. The recruiter then agreed to a time, that time rolls around and I receive no phone call. (Interview was scheduled on 16/08/2023 at 13:00). I then receive a response at 13:32 from the recruiter explaining that they had a few meetings which overrun and will call me back ASAP. No worries, happens all the time I thought. So, I respond the following day (due to meetings) with some times that I am available to be called (the "ASAP" never happened that day anyway). I then reschedule the interview on Hackajob, and the recruiter accepts (01/09/2023 at 10:30AM). 10:30AM rolls around, and no call again. I send a polite email at 10:33AM asking when I could expect to receive the phone call, no response. I then send an email on 05/09/2023 at 11:41AM asking whether we can reschedule, as the meeting did not go ahead. At 11:46AM I receive a response asking whether I am available later that day to have a call, which I was, so I responded with some times that worked for me (at 12:19PM). No response yet again. I then send a follow up email with some availability for the week, including times, on the 11/09/2023. No response yet again. I then send yet another follow-up email to them on the 13/09/2023 bumping the email to the top of their inbox, in case they missed it, as I know from experience that emails can easily get buried under others. No response yet again. Fast forward to today, 20/09/2023. I have sent a follow-up email again. No response (as of yet).