Nandos sort yourself out

Nando's Ruimsig, I've spent probably thousands of Rands with you up till now. I order using the app, pay using the app. Tonight your driver calls me saying I owe him R13. What bull is that? Speak to the manager and he's trying to convince me that the price on the app is wrong for the Festa fries and that I short paid with R13. I don't care! If your app prices are wrong sort it out! Don't call me an hour later saying I've some how managed to make your app charge me R13 less! In what reality does that make sense!? Did you think I was going to just give you extra money because you say so.... Your problems are not my problems.