useless manager

So I ordered and was told to wait for my change that I ddnt mind coz I was also waiting for my change.i got my order and politely asked for my change and the response from Nancy the rude teller told me that she doesn't have change and there is nothing she could do,Sifiso Myeni the so called manager intervened and told me that he does not put R20 in the tills.that was so rude and pathetic of him