AT&T TDP- Technical Business Manager interview questions

One of the most unprofessional interview process I ever went through as a new grad recruiting (TDP is ATAT's new grad program). Interviews started off well with HR and the rest of the team, albeit a bit scripted (they mentioned they were reading from a script). However, after completing all 3 rounds of interviews I received 0 updates on my candidacy despite multiple emails to the recruiter. The recruiter said she I would hear back "by next week" which turned into a month. When I emailed her again (after 5 weeks), I received an automatic reply stating that my email had been blocked/undelivered to sender. Never had I dealt with a company so unprofessional and disregard a candidates timeline + time.