Made an ordered online but was charged twice. They refused to refund and told me to call customer service. Now I have to talk to an AI chat since they don't even pick up on customer service. My order

I submitted an order on the Subway app to this location for an 11:40 pick-up. It's not near me, but in my way home. I called to modify the pick-up time. I was told I did not have an order. Mindy said

Customer service wasn't all that great, just keep rushing me to finish my sandwich and mind you there's no wait and I'm the only person in here