We had two separate orders but they would not take them at the drive thru so my mom went inside and I continued through the drive thru. I ordered 2 original chicken sandwich's, 2 small fries and a large onion ring. I gave the women a $20 and a coupon that was for $4.99 for the sandwich's and fries, to pay for the order and she gave me back $4 and change and the coupon. When I got to the second window I mention that she didn't honor the coupon and I was suppose to have more money back. I gave them the $4 and they left the window open and my food sitting on the window (it was currently 47 degrees out). I waited for nearly 5 minutes and no one came back to the window. I drove through and walked in. I said I wanted them to remake my order since it was now cold. She asked me what my order was again and I said that you have my receipt. The manager then gave me back $6 and change. I finally put the money on the counter and said I wanted a full refund, which took another few minutes. I drove to another Burger King and used a second coupon, the exact same and ordered the exact same thing and they gave me $12 in change back, which is correct. The North Durango location is ripping customers off. Additionally, while my mom was inside she noticed that there were at least 25 pre made sandwich's and no one was in line. Then she watched them clean off the dirty tables and put the condiments back into the bins. No one wants old sandwich's and no one wants someone else's ketchup and napkins. The location was very dirty compared to the second location and it was poorly lighted.