I am a Research Scholar and an Indian National and had applied for a Standard Visitor Visa (Academic Visitor upto 6 months) to the UK. I was invited by a faculty at King's College London (KCL) to informally interact with him on a topic of discussion. This is purely an informal academic visit and not an internship. For this I had given an invitation letter from him stating clearly the same and also other supporting documents.
The ECO at SHEFO got King's College confused with University College London (UCL) and, hence, could not find any supporting documents from the ones I had submitted regarding UCL. So, my visa was refused. How do I go about overturning this decision? I have mailed them and also tried calling them but got no response.
I'm due to leave on May 21, 2017. I haven't yet cancelled my flight bookings and reservations. Here's a scan of my refusal letter.