poor service

i am unhappy with the service i received at truworths eastage today. they refused to exchange a lingerie that i received as a gift. this item has never been worn, swing tickets were attached and i had a gift slip with me that was issued out with this item. when i asked her what then is expected of me as a customer to do with this item 3 sizes bigger than my size and she said i must sell it. and she also mumbled about the purchase being done a month ago??? this is up-holing as much as there are exchange policies across but that doesn't mean one shouldn't use their own discretion. all i wanted to do was to exchange the 34D lingerie gift for a 32A and i was refused. why then issue out gift slip for items that you as a company know that you don\t exchange???<br> <br> please advice me on this one....what must i do with the item that is 3 sizes bigger than my size??? this is your product and you still have it on your floor"