So sorry to hear you had this experience, especially that you moved only few months agon in the area.
The area itself is not bad, but recently we are hearing more and more of these negative experiences. Some people say they are local drug addicts, well known to police, others say people from other countries, latest ones entered the EC. We don't know, others say some sort of sickos. Who knows.
Did the police do anything? Are they investigating or are you like me another statistic? Once they give you a number they don't want to know. My burglary was around that time in the Horniman area. No one called the police despite the alarm being triggered off.
Still nothing has been reported, although I saw a middle aged stocky woman around Victoria Station with one of my necklaces, By the time I realized it, she had gone among other people. It was very upsetting.
and even if I stopped her, it could have been me to be in trouble, not her.