Uber eats *****s it's drivers and it's customers

I ordered uber eats using a voucher, and paid the driver when he came the amount that both his and my app displayed, plus tip.

This morning, uber eats informs me that I owe exactly the amount of the voucher, and the voucher credit is used up.

Re-imberse the driver what you doubtlessly took from him, and sort your app out, you absolute muppets.

The app intentionally makes it as hard as possible to use the voucher, and if the user still manages to figure it out, uber eats just ignores the voucher anyway.

Was the app built by a child?