Bad experience!!

Went to this establishment in Cape Town CBD, unfortunately money was torn and they refused to sell me what I wanted because they are saying that, and I quote, ‘even my friend does not take torn money’!! Haybo!! Where are we does chicken licken bank with ‘my friend’ nha?? I am so confused because this is not the first time I mistakenly tear money and have never had a problem buying with it before. Worst explanation I have ever received as a consumer, and by the way who is ‘my friend’??? ??