**** mate, they sound like a couple of pussies tbh. That punch was a good move haha. They might try and shank you though lol, or they could just be all bark and no bite, most of the people I know that listen to gansta rap are lonely douches with nothing to do.
If you are worried they're gonna find you, always walk with someone else and bring something along with you. They keys was a good idea, something like that which would give your punches a bit of extra strength. Other than that though I'd just let it slide to be honest.
Was that in Swansea? Great, uni there should be a blast XD