The two of them need to sit down and make a video about racism. Go on, sit down, attack the subject, tell us what you have learnt, and don't just use words, but go to the institute of racism, show racism the red card, go on to youtube (that's your jam) and search for casual racism and see what comes up.
Research it, educate, put it out there - send it to all the brands you want to work with and how you were a flipping fool, but you went away and did some serious reflection on the seriousness of it and this is what you've learnt and what you've told your followers.
Look up what happened to Jade Goody after Celeb Big Brother, Ron Atkinson ....