Bad service

I bought ultra Mel delight caramel flavour on the 20th of February 2016. The ultra Mel delight tasted off but the expiring date was the 3rd of March 2016.I went back to spar on the 21st of February to return them at 19:00. I was told they don't return things at night. But that is not stated on the slip. The consultant seated at the customer service booth showed no willingness to assist as I was trying to explain to him my dissatisfaction about the the entire situation. I took my own time to come report an incident only to be told that, the property now belongs to me and they couldn't assist me, my issue was that the goods are perishable and if I brought then back the next day it would have been as though all my efforts were futile. This is no way to treat a customer