Dissatisfaction

So My sister was a MiWay client, then switched to another service provider without claiming for over 3 years, she was then involved in an accident a week ago, when the current insurer asked for her insurance history, MiWay produced false information about her claiming for four tyres late last year, when we called, it turns the car claim was for a totally different vehicle than the one she owned at the time, I am totally disappointed and hope to get answers for this.