Littlepay interview questions

I was contacted by a headhunter, after which I had an interview with one person from the HR team. Until this point everything went well and the interviewers were fantastic. However moving forward, the interview process and the scope changed multiple times. Recruitment was supposed to be a minor part of the role, but the whole interview process was about this topic. They declined me without any appropriate feedback (I was outside of their budget most likely), and even when asking them for feedback - they never replied. Very unprofessional HR team and sad to see how poorly other companies conduct business and interview processes.

Hr recruitment was responsive. Interviewers were nice. There was regular feedback. But didnt receive a rejection letter towards the end after I submitted my output for one of their technical assessments. A rejection letter would be nice to receive rather than being ghosted