IDP IELTS — Agent is not responding in professional way

My agent who was dealing my file for abroad studies left idp after applying offer letter. My file automatically handed over to new agent by idp. That new agent is totally irresponsible. Whenever I used to call him, he cut my phone by saying I am sitting somewhere else I am filing someone's else visa file. He is totally unprofessional. This behaviour is not expected from idp agent. I want my file to be handed over to one professional and responsible agent.
Kindly contact me on email id pooja.sg.[protected]@gmail.com.
Also you may contact me on [protected]