Subway complaint: Treatment of an employee by the owner’s son who is also an employee

The owner’s son is an employee at the store he is between 18 and 19 her daughter is also an employee there she is 16 she has left her there to close the store which she is not old enough to do her son used the n-word making a racial slur towards a customer after the customer complained about her sandwich and he makes other employees feel unsafe that work there due to their sexual orientation. This employee’s name is Aiden and I don’t think he belongs in customer service if he does not know how to treat the customers or he does not know how to work with other employees of different sexual orientation. I have tried calling corporate I have tried calling headquarters and get nothing but when another employee feels unsafe to be there because of their sexual orientation and another employee is using racial slurs there is a problem especially when the employee making the slurs and other people feel unsafe is the owners son.