Bad attitude

I purchased sunglasses online for my boyfriend for his birthday. It did not sit right and we decided to return for a voucher to get something else. I took the sunglasses with its original package to Woolworths Waterfront in Bloemfontein. Firstly NO SMILE!! Just a hey... I almost waited 10min for the manager to arrive - He told me due to hygienic reasons you do not refund sunglasses? Since when?? I know about underwear.. I then showed him on my slip it says underwear - Nothing about sunglasses. He than said ok fine IF the sunglasses is not on sale they will refund? Really? Just excuses the whole time.. He then left to “search” something on a computer.. The lady that helped me at the till stood there not knowing anything laughing at me in my face when I asked why everything is taking so long. I then asked her why is she laughing, not helping at all but laughing in my face!!! I am the customer and they need to start treading us as customers!!! I am so angry at the way they handled this today. At the end I received my refund on a voucher but I am not happy with this service I received!!