Dissatisfied customer

On 2 May 2026 I bough a bag of nappies for my female dog which is in season. That night when I opened the bag the nappies inside was not for a female dog but for a male dog although thr package was labeled dog female small. As I always do I didn't take my slip as I thought there will be nothing wrong.

On the 3rd of MaybIbwent back to the store to return the nappies. The manageress told me because I dont have a slip and she must reprint it she cant refund me I can only do an exchange. But there was no small female nappies on the shelf and I needed it for my dog. Did mot need anything else. She also said because the bag was opened she can't refund or do an exchange as the supplier will not take it back opened. So I asked her if I did not opened the bag I would not have known that it was the wrong nappies and they labeled it wrong not me. She refuses to refund me and at that stage I have lost it and through the nappies back into the shop. What must I do with male nappies if I have a female dog. I told het I will never buy from them. I am so disappointed. A bag of nappies has cost me know much more. This is terrible service from a shop.