Computer Mania Cavendish - Bade service / lies

Was in the shop o Friday the 28th of December to buy a keyboard. While making this purchase we asked about a graphics card NVidia GTX 950. We were recommended the card and told the sales person we would be back on the 2nd of January to buy it. We went i to the store on the 2nd of January and were now informed that they had none in stock and were offered the model up. This was all done very rudely and we were brushed off. Were they lying on the 28th or were the lying on the 2nd? It had to be one of thiese. The staff are rude and unprofessonal and wll never be using their services afain.