Hello, why do they think you were racist towards them?
And how is that racist?
I really do not see how this could be a racist comment. It is a shame that bullying cannot be challenged legally in the first 2 years of service without there being discriminatory grounds for it. I would still suggest that you pursue this through a formal internal grievance with the employer. If needed - sign yourself off sick for some time. If they consider dismissing you in the meantime then that would give you some better reasons to try and argue that the dismissal was discriminatory, for example if you have a disability, like the medical condition you mentioned or depression, etc.
No additional price. If you could please leave your rating for the responses so far then you can come back on here with any short follow up questions you may have. thank you