No refund on sealed tin of baby formula with a receipt.

I'm so disappointed with Pick n pay. I purchased baby formula only to find out my husband and brother also bought baby formula, so I decided I was gonna return one tin and purchase something else. Then I was told I couldn't return sealed tin with proof of purchase. What a dissapointed I'm never ever gonna go buy groceries from Pick n pay and I'll be telling friends and family to do the same. Pick n pay is disgusting.