welcome! hope you get it all fixed.
I'm also in south east London looking for a smart repair person to sort out one little ding and some scraped paint on a wheel arch.
After one ridiculous quote of £1000 from a repair shop used by Audi (I didn't go through Audi just contacted this place directly) I have been looking for smart repairers on this site
http://www.smartmapuk.co.uk/
If I go to one of them and they are good, I'll let you know. If you find a good one please let me know.