Need help with fighting?

Yo, So I live in a pretty rich town in London the only probably is I live in the shittest part of that town. Theres loads of Pykes and Afghans and i'm not to friendly with these . I got chased by a gang of pykes today just after coming back from a party. I never did anything to them. They randomly start on people by stepping on my shoes and pulling my hair when I got off the bus. They're all mouth tbh and I could **** them up easily. Can anyone give me some good tips for fighting multiple people and weak spots, locks etc.. I had an arguement with one of them today and we live very near each other and I don't feel very safe.