Starbucks

I went to this Starbucks location,I went through the drive thru and ordered just one drink. When I got to the window, after paying for my drink, the lady hands me my order. The lid was filled with expresso and as she hands me my drink she tilts the cup. There went expresso all down my car door, through the window, onto my door panel, and onto my seat and center console, landing on myself and my baby niece who was sitting next to me. My BRAND NEW CAR STAINED AND MY BABY NIECE UPSET! When I told the lady coffee just got all over my car she handed me napkins and slammed the window shut! I pull into their very few parking spaces and attempt to clean the mess and wipe coffee off my baby's legs! And to top it off, they couldn't even make the ONE drink I ordered correctly. I called the "manager" who claimed he was the shift supervisor, he assured me the store manager would call me back to correct the matter. He even thanked me for "bringing this to their attention and giving them the opportunity to correct the matter". It's been three days and I have not heard from anyone and now I have a brand new car with stains on it and a 7 year old niece who "hates Starbucks". I have never been so dissatisfied with customer service!