Ambarrassed to the society and staff

My girlfriend went to Mr Price Gateway mall to submit her application forms for an account, 5 minutes later as she leaves the store, she was accused of *****ing a pair of shoes which she was wearing and I had recently bought it at the same branch, she was even forced to take it off because it looked new. She was so embarrassed even came home frustrated and traumatised that people will see her as a *****, and worst of all she works at the same shopping centre, travels with most of the staff working for this *********** store. Surely something needs to be done about this, and I, myself will make sure about it, justice needs to be served or else we will sue this company