Dealing with a melee cleave as a Spriest

Hi, i have a lot of issues dealing with getting trained against double melee comps in 3s, not sure what i should be doing. (note i'm not super high rated as i recently just started doing arenas seriously) I just keep getting interrupted over and over or stunned. I most of the time manage to juke one interrupt but they just have so much to keep me locked down. Any help would be appreciated :)