Starbucks

I work next door to this Starbucks and ordered a cappuccino on mobile like I usually do. Since I'm the only person on duty at my job I have to get back quickly. Usually I can just walk into the store, tell them my name and get out with my drink. But this time when I walked there, the door was locked and there were about 5 employees inside. I decided to call the store instead of knocking because it seems pointless as they would think I'm a customer who's trying to order something at that time and ignore me. When I called, I asked them if they can just open the door and hand me my drink since I'm already at the door or would I have to get a car and go through the drive thur? They said they'll be right there with my drink but when they handed me my drink it was half empty. You can feel that it was half empty when you hold the cup, the weight was very light...so I'm not sure why they would serve it like that. They're lucky I was working or else I would have turned around and open the door before they can lock it again. Did not have the time to complain right then and there. A waste of 5 bucks and I honestly didn't mind anything until they served me a half empty cappuccino. There were no cars in the drive thur either and I ordered my drink 30 mins before I got there too. They had plenty of time to make sure my drink was right before serving it.