Staff training & service

Ordered a mega coffee and mega hot chocolate.

3rd time trying to pay using Wimpy's own App and the staff do not know how their own App works?

In the meantime my order is made in the kitchen, the coffee is given away twice to other customers who walked in after us. When I query my order, the waitress and kitchen staff land up in a huge argument, because the kitchen staff know it was made, but only half the order is now standing there now. Ridiculous!