Quint, that sounds like such a shame, and difficult for you.
I felt like you did when I lived in London. I find London a quite unfriendly place to live really.
I moved to a village in the home counties, all WI and cake sales and local community shit 'n stuff 
and the foreigners in this village are treated like a bit of a novelty, people say they like my comments on British Life (I love it but some things puzzle me, like the need for 1001 committees, the love of Kate Middleton, the "no thank you, I couldn't possibly, oh no, really. Oh, go on then just a little bit" ), maybe they are just being polite. I like to mock them, and they mock me!
Seriously, London vs a village in the country, it's like 2 different worlds.
Leave London!