Sonic Drive-In

I am a school teacher and tried to order on app for classroom of 20. Sonic app stated it was having technical difficulties. Drove to Sonic to order using App. Still not working and was told it was down. Attempted to order showing phone with app. Manager was hateful and staed she had no magic button to push and she wasnt a computer expert. I will no longer do buisness with sonic. We normally treat our grade school students to Sonic. But 100% our school will no longer do buisness with Sonic.