NTT DATA Customer Success Manager interview questions

I applied for the position online. I received an e-mail the next day or so that had a series of questions in it. I responded to the e-mail, and the following day I received a reply. I replied to that one, and it was another day before I received a response. They only seem to respond to e-mails or each person once per day. This went on once per day for a few days. Finally, we set up an agreed upon phone interview. After no call was received for the scheduled phone interview. I called and left a voice message. An hour later I received a very unprofessional e-mail saying they changed up what they are looking for so there won't be an interview. If a company shows this much disrespect to interviewers, I can only imagine how terrible they must be to work for. A lot of the other interview reviews shows this company is very disrespectful to prospective employees, and that is a major red flag.