Mcdonalds beackn bay retail park

Just had thee worst experience at Mcdonalds Beacon bay Retail park after being thru the dive thru twice only to wait 20min then get to the pay point and the two cashiers are arguing about R49.10 failing to address me or ask me to please hold they continue at it after waiting 10min still not helped eventually i just drove away!!Pathetic service!! Serve your customers instead of argueing...now you lost a customer!!