The Ink Shop Unhappy Customer

I have been a loyal customer of The Inky Shop Durban North Hyper By the Sea. I bought a Brother Ink Cartridge mid Feb 2026, it was printing thick black lines down the side of the paper and quickly due to this the Cartridge ran out of ink. I went in to the store and purchased a brand new Cartridge for R400 from them and explained the issue I had with the previous Cartridge, they indicated they were getting rid of old stock with a buy one get a discount off the second and that I probably had a faulty Cartridge. A few days later I took the faulty Cartridge in for a refund along with evidence of how the Cartridge was printing and was advised I couldn't get a refund but a replacement, why would I need a replacement when a few days earlier I purchased a new Cartridge from them for R400. I am shocked, I have supported this branch for over 3 years and they would rather lose my business than refund a loyal customer.