Do I have a legitimate reason to sue a company?

I live near Fort Wayne, IN and I have applied many times to a company and always get turned down. I am in a wheelchair and I submitted a discrimination complaint to the company and a representative replied that she works with a handicapped person in the corporate off but I meant that they don't have any handicapped employees in their individual stores. Even one of the managers I had an interview with said that hesitate would be difficult for me to work in the store I was applying to but there were ways to fix those problems. Plus the corporate representative I talked to told me to contact her as soon as I put in an application so she could try and help by talking to the district manager but when I contacted her both through email AND texting her. She never replied to let me know she was still going to help.