False Advertising

I stopped at McDonald's for some coffee with my mom. In the drive thru the sign said R29 cappuccino with a Mc Cup. So I get to the window and they give me a take away cup I argue that thw sign says it comes with a Mc Cup (a ceramic cup) that's why its R29! The lady stares at me blankly like she doesn't even work there. I honestly have the worst luck with Mc Donald's Plumstead if the service isn't snail slow, the customer service is atrocious. And now the advertising is false.