Worst experience & terrible manager

We were at the Malvern DBN branch drive through. Gave our order & went pay. When I received my receipt I noticed it was incorrect. R397 was our order but was given a slip for R281(which i paid) the lady came to "correct" it however he demeanor was absolutely disgusting. She then told me I would have to pay the diff if R281 and my initial order which was supposed to be R116 - i was charged R138 which means I paid R420 for my order.I called to let the manager know I was not happy and she had a terrible attitude. The chick tenders omw what a disappointment!!! THIS IS BY FAR THE WORST EXPERIENCE AT A MCDONALDS!!!