Dishonesty

On Monday evening we went to Canal walk spur for dinner, we had a gift card for 250, when our waiter returned after taking the payment, handed me the gift card with no slip, I asked dont i get a slip to say how much remaining on the card, he told me that they ended off the sale before printing, our bill was around 160, which gave a balance of 90, on Saturday when we went to grand west spur, they checked the card and the balance was zero... so that waiter at canal walk ****** me of 90 ... im soooo disgusted with spur!!!