Steak 'n Shake Enterprises — product and service

Went to steak an shake tonight thru drive thru. Voice said go ahead. So I said #6please and she said DRINK! Flat and annoyed I said coke then she asked anything else in same tone I said #5please an again drink Dr Pepper .and she repeated the the order an loud flat annoyed tone said pull thru. OK as I wait my turn threw closed window she yelled at some one saying hold on. Then gave me my food she called some one a [censor] threw her walky.gave me my recpt an said thank you mam have nice night. I said thx... I stayed an checked order she gave me wrong recipt an win I checked my order it was right but smashed an ugly .she saw me but never asked so I pulled to front to check 1more x an leave.what happen to friendly service?