Poor client service

I bought bed side tables. I was not happy with the product and returned it to the shop today. The items was still the big boxes. When I got to the shop after a long day at work. The cashier in the store told me they offline. And I had to wait. Whilst waiting for 15 minutes the cashiers in the store was dancing and fooling around in shop. I was then told to to come to return tomorrow with the boxes they can't help me with the refund. I was upset and said I'm going to report them to head office then the lady said she willing to call them on my behalf. The audacity. They are so unprofessional. Sheet street in southgate mall