Disgusting customer service

I purchased a spring-action mop from Value Co at Pavilion in Durban. It was an extra long mop which I thought would be great as it would cut my mopping time down. Unfortunately the mop is too big for my bucket. I asked Value if they sold buckets large enough for the mop. They do not. I then asked if I could then swap the mop for the exact same brand, but just with a smaller head so that it would fit into my bucket, especially in light of the fact that the mop was still in its original packaging. They refused as it was more than 7 days since the purchase. I appreciate that the store has policies. I would understand their attitude if: (a) they sold buckets to go with the mop and/or (b) I had removed the packaging. It would have been a simple, straight swap and I would have even forgone the slight difference in price. SHOCKINGLY BAD CUSTOMER SERVICE!!!!!