Bad service from HR

I called HR with a complaint about an employee on 18 February 2019. The HR position is a male and spoken very nice at first but when I was not finish speaking he interrupted and I asked his name. He refused to give his name although in my opening of the conversation I introduced myself with my name and the purpose of my call. During the conversation when interrupted me and I told him I am not yet finish speaking , he said he will put down the phone . I remained silent and he was talking to another person at the same time. I kept on saying hello, hello, hello and I could hears voices in background. Probably left the phone on the desk but not not disconnect. I put the phone down after waiting 5 minutes on my cellphone. This is so unprofessional for HR position.