Provide necessary information to customers

I am absolutely appalled by the treatment I received from YDE Eastgate mall staff (one cashier to be specific) . I bought a jumpsuit that was already stained when I bought it and the cashier did not care to tell me the relevant protocol as to what happens when I return it with the very same stains, neither was I aware there's protocol behind this. I was in a hurry and took the jumpsuit anyway. When I returned it, the cashier was so rude despite how polite I was and how peaceful I wanted the conversation to go. I was treated like a ******** having not done anything wrong. Had I known the stained clothing cannot be returned, should I need to, I would've have taken it. Had the cashier told me I cannot return it and there are ways of getting the same piece of clothing in a better condition, I would have opted for that option seeing that I am paying a lot of money for it. I cannot remember her name, I was too angry to even catch it. She is dark and wears glasses. She denied it was her who assisted me even though on their system and receipt it recorded her as the operator. I am really not happy about how I was treated whereas in my eyes I haven't done anything wrong, I did not even wear this clothing,let alone fitting on the part where it's stained. Horrible attitude from the cashier. Disgusting behaviour towards me as a customer. However, the guy who helped me was very polite and tried to help me the best way possible . I don't know his name either, he also has specticles. He is very helpful, even with other customers. As for the cashier who raised her voice while speaking to me, I am so annoyed and disgusted at this kind of attitude and service in the workplace. Treat your customers right despite who they are. Customers are not always right but in this case, I was right. I hope you get the relevant training to uphold the good reputation of your company.