incorect change/ no appology exct

On sunday 08/01/2015 my daughter wanted to go buy a T-Shirt at Mr Price Tygervalley. She bought two shirts for 129.90 (invoice***) and paid with R140 which i gave to her. She got 10c change and then she said, but it is not right, there should be R10. I took the slip and saw she was right. Went back to the till and the lady behind the counter pointed to the person that helped my daughter and said some to here in a black language, apon which the assistant responded back, also in a black language. The supervisor/manager then said something to the 1st girl, opened the till and then handed me the R10 note, which i took. The supervisor/man.then turned around apon which i stopped her and complained about the following<br> <br> I was done in wrongly, but the people behind the counter does not address me or offer a explanation, instead they speak to each other in a language which i do not understand 3 times. The assistant that made the mistake, offers no apology, she just goes on with duties, neither does the one standing in front of me, neither does the supervisor/manager. THIS IS WRONG. When i ask about this, i was told, i should have been apologized to. If i said nothing...?