Booz Allen Hamilton interview questions

Interview process was great and everything moved quickly. Communication was great as well. I finished two rounds of interviews and was made an offer. I accepted the offer then the company completely ghosted me…they didn’t respond to my texts, calls, or emails. There was complete radio silence. Weeks later the veterans hiring center finally did get in touch with someone to ask what was going on. They told him that they had my paperwork but “things were just moving slow”. I never heard from them again. A courtesy email or call to let me know they changed their minds would have been nice. If they came across a better candidate I would have understood. I found it extremely unprofessional for them to have handled it the way that they did.