studio88 eikestad manager's rudeness

I bought a sneaker on 3rd Jan 2023 and it was the last pair that on display and since I wanted the sneaker I took it while the left shoe was dirty when I got home the size was too small for my son and so I took it back when I got there there was a girl whom they said is the manager she basically told me to **** off what is she gonna do with a dirty shoe I tried explain she just rolled her eyes and sat behind the counter and continued helping other customers.