Fiserv Product Manager interview questions

The process spanned over several months. They never followed up, constantly had to reach out to recruiters. The interview had to be rescheduled. I expected professional courtesy from a reputable company as such. How difficult it to send an email to let prospective candidate know if there is no interest. I simply gave up. I still don’t know, yet they have hundreds of open position? I met all the qualifications required for the position. I regret wasting my time.