You, unfortunately, can’t take legal action against this. But you can try to talk to them first. You can do one thing. Either you can start searching for a new job or you can stand against them. You can warn them that if they will harass you again then you will take action.
If this continues in the long run then you can write an e-mail stating all the things they have done to you. And you want the management to look into the matter carefully and take action accordingly.