Worst customer service ever

I had the most humiliating experience at Builders Warehouse Strubens Roodepoort. Me and my colleague were there to buy 2 2litre buckets of paint and one of the buckets fell down due to a faulty right outside their exit. The lady that was called to assist us by the the name of Chantelle I think, rudely told us they will not refund us because a faulty trolley is not their responsibility and we were not supposed to pack the paints on top of each other. I had to take money that I don't have to buy another paint to replace that one. And to make matters worse when I come back the staff is watching my colleague try to lift up the paint into the one of the empty buckets that we had yerrr is really broke my heart even now as I type this my hands and my clothes are covered in paint. My colleague is even worse I could even upload pictures that I took of the humiliation. Haven't worked in retail I know for a fact that if I were white I was not gonna received that kind of treatment