Don't worry, just contact admissions.
I find it interesting that people on here are stating their opinions about KCL like they are facts. LSE can have more blah blah blah than KCL and UCL may do blah blah blah differently than KCL but that does not mean in the general sense that one is better than the other. When you say UCL, LSE, Warwick etc is better than KCL, that is based on your own individual expectations and should not be used as general facts.
For example, I am beyond thrilled that I got in my program of choice because it is a well-known program in my field of interest and it has everything I need to pursue the career of my dreams. Someone else who looks at the same program with different career aspirations may find something else that fits their needs better at another university, but that does not discredit the program from being a good program.
King's is a good university compared to hundreds of others in the world. It may not be Oxford, but don't discredit a university's prestige because it does not fit your definition of the word. The fact that a student can have access to impactful academic experiences and great career resources on a level that surpasses many universities around the world is reason enough to believe that KCL is just as great as LSE, UCL and the others.