Skechers India — refused to change that defective slippers

Iam a doctor. I have bought slippers from a shop of sketchers in IP Mall. Sigra Varanasi (up) in May 19. The sole was broken and I returned it in feb/March. 20. After lockdown opened shopkeeper refused to change that. Bill given to me was computer generated now nothing is visible. Cost of slipper is about 3800/. Shopkeeper told me you should not use it in bathroom. I don’t know slippers are party wear ? Kindly do needful because it doesn’t sounds good for brand like SKETCHERS