Unhealthy working environment

I'm not happy with the service I got at edgars at Westgate mall, the staff is not happy due to the treatment they get from their store manager, the lady that was assisting me was sad but did give me a better service, I had to ask why is she not happy she told is a casual for 10 years and she have kids to feed and the store manager is a bully and threatening to her and other staff members, as a customer im canceling my account with edgars and promise myself im no longer shopping at edgars because the staff works hard but people at the top don't take them seriously