I ordered online and prepaid online, when I picked up my order the location was out of...

I ordered online and prepaid online, when I picked up my order the location was out of chips. I had ordered two bags of chips and prepaid for them online. The restaurant told me I would have to go to Chipotle.com to get a refund for the two bags of chips I did not receive. I did that, * times over the course of * days with no response. I then called the restaurant and spoke to the manager who assured me he would be in touch with customer service and get the issue resolved, that was * days ago and I never heard back from him. I then called the direct line for Chipotle, don't wait for customer service, you will get a message saying to call back later every time, I pressed the number for accounts payable and told them I was an unhappy customer and they got me to customer service. They took all my information and guess what? I still have not gotten a refund for the two bags of chips! I realize it is a small amount but what should I pay for something I did not receive??