Costco

Came to Costco for dog food and muffins. My sweet 5 year old accompanied me. She wanted a hot dog before we left. Cashier said they'd be ready in 6-7 minutes. Few minutes later, they start taking hot dogs off the rollers. We were standing to the side of the counter, could see it clearly, and my little girl liked saying the numbers after they were called. She had our receipt in hand and was watching the progress. Cashier started calling higher numbers. Confused, we watched hot dog after hot dog leave the counter until the counter was empty. Each time, they said "Sorry for your wait" to each customer. It was 20 minutes in total we waited. I asked about our order. Cashier clearly huffed in annoyance, grabbed a hot dog and tossed it on the counter while turning away. I was speechless. "Sorry for your wait?" I asked incredulously. I couldn't believe her rudeness. She turned back and said "Well I'm not. I'm not sorry for your wait. I called your number, your order sat there so I put it away." I looked at them, then at my daughter, who the food was obviously for and said to the cashier, "No. You didn't. You are lying. We saw everything that touched that counter during our wait, you didn't call our number. You told every other customer Sorry for your wait, why do we not get that courtesy?" She continued to argue so we left.