Seller and Manager making me a laughing stock

I was at Cash crusaders in Witbank at Klipfontein and i wanted to Laybe Dj Pa System which cost about R4000 and had R2000 in my pocket. Im afraid ill use this somewhere and i needed to do this laybe so i can pay it off next month for my sons birthday. A seller by the name of Zipho told me they only do cash and i ask him to call the manager. Later he came back laughing at me saying the manager dont want to see me. I felt so very low when this happened. Had to go without being help.