Very disappointed in Woolworths

I bought a pants by woolworths last week I decided to take the pants back which I never wore and it still had all the labels including the price. Unfortunately I lost the slip but I had had the slip of the payment I made on my account that day and the lady was able to track the sale on the woolworths system, but the pants is now on sale now I only get refunded for the sale price of the item which I think is ridiculous cause I paid full price for the pants what if it was a gift and the person didn't give me the slip?. I mean really this is how you want to rob me a loyal customer for years? <br> <br> The sales lady that helped me also had an attitude and I am so disgusted they make you feel like ****. How does a company that claim to care about their customers rob and treat them like that.<br> <br> I want my money back!!! so I lose a paper slip and have to pay R175 for that.