Blukids refuses to do an exhange for damaged item

I have purchased an item of clothing (babygrow) on the 50% sale for my child. I know their policy says that you can only exchange, no refunds. Problem is, after 3 washes the fabric is making holes where the studs is all along the legs. So naturally I would like an exchange because the quality is not up to standard. The fabric is literally tearing away from the studs. So when I take the item there they tell me I don't have the swing ticket anymore, it's not in it's original condition and I've cut the washcare label off. Yes, I washed it and my child wore it like 3 times and it is damaged and you expect my child to wear a babygrow with the longest washcare label there is? I still have the receipt mind you. But they totally refuse to assist. So you want t tell me that there is no refund/exchange on damaged items in Blukids' returns policy? Is it not my right as a customer to get an exchange at least within 6 months if an item is damaged/manufacture fault? This is not even 6 months, it is 3 washes in 2 or 3 weeks. Now the consultants wants to tell me they are sorry they can't help me and just smiles after I bought a pile of clothing from them? Blukids will never see me again. Sale or no sale.