Incompetence at till of Toys R Us

Today we experienced incompetence at the till of Toys r Us again. They did not accept the former 50 Rand note which is simply just a normal legal tender and not even out of circulation. They refused to accept it and said that we must change it at the bank. I don't know where they get this wrong information from or if they just want to make a story to be important but this was obviously wrong and nonsense. The banks do not change legal tender notes which are still in circulation and people who work at the till at a shop like Toys R Us should know that or ask their supervisor if they are not sure of something.