Two confirmed cases, and one case where they encouraged employees to kill themselves (I'm not kidding):

https://www.francebleu.fr/infos/societe/lidl-vise-par-une-qu... (in French)

"Blackmail, pressure, favouritism, bullying, sequestration in an office, incitement to suicide and intimidation: the accusations made are edifying, the testimonies surprising. The management of another time."