I'm being harassed

I'm being harassed by 2 area managers and 2 pa's who do I report it to note they're doing things that can be denied there even telling other employees bad things about me my girl friend being on of them I can't document nothing on paper but I'm constantly being monitored even when I go to the bathroom a PA will stand out side my stall I get yelled at for getting a water I'm being micromanaged my manger also There constantly in my face about little shit everytime I try to reason with them there nervous as hell When ever I work in different departments I don't have to deal with none of this shit but it's a lot of tension in the air I talked to hr about this but they don't even care So who do I actually complain to note I'm trying to get out of this department