A few years back I landed in the ER and while I was hospitalized my brother decided to do me a favor and mow my lawn. He was a bit too enthusiastic in his approach and ended up mowing down two Bartzella peonies I had planted the previous Fall.
The plants survived but it took them an extra year to start blooming. Now they look great.
I agree with all above comments: chances are the plant will recover but to stay on the safe side forbid to anybody to touch your garden without your explicit authorization. I'll leave the use of death threats to your judgement.
