My advice would be as follows:
1. Get Union representation.
2. Get your Service's Policy on 'Bullying and Harassment'
3. Get a copy of your Service's 'Greivance Procedure'
4. Arrange an 'around-the-table' meeting with your line manager, their representative and your union rep.
5. Explain to them you feel bullied and it's affecting your life and you want it to stop.
This should have the effect of showing you to be taking the higher ground and trying to remedy the situation. You can make it clear that if it continues you will move to the formal Grievance Procedure, which would affect their promotion prospects. And it will strenghthen your position, but more importantly, stop the bullying.
Good luck!