It’s important to realise you are not alone and that there is legal protection which can be sought.
The key steps to take are:
Bullying doesn’t (on its own) give you a legal remedy, but your employer has a general duty of care to look after your health and safety, including from psychological dangers.
If you are being bullied, harassed or victimised related to a ‘protected characteristic’ (such as your race, sex, disability, age, sexual orientation, or religion/belief) then discrimination law gives you further protection. The same key steps above apply.