Microsoft Risorse Umane interview questions

I was referred to Microsoft through one of their HR team members. I spoke with a Microsoft recruiter about HR opportunities. The conversation seemed to go well, and the recruiter suggested I could be a fit for two different opportunities she was working on. She said that she would have her colleague to reach out to me to schedule phone conversations with both hiring managers and also sent me a follow up e-mail with details on scheduling next steps and additional information about Microsoft. I never heard from the individual who was going to reach out about scheduling, so I contacted the recruiter again. I reached out to her multiple times by both e-mail and phone and never received a response. I find this lack of follow up unprofessional and would have expected the recruiter to acknowledge my messages to her.