Require urgent intervention with RVN team

This is really quite frustrating. I was told by the branch to email RVN for you last Wednesday, which I did. I followed up with a phone call on Thursday and was told RVN team have a turnaround time of 48hours to respond and I should have my response on that day or Friday. Here I am still waiting and annoyed about what next to do as no response has been sent to me to date. Please urgently intervene!