Poor client service, ****** and rude owner!!!

I ordered a Barbie Cake 2 weeks in advance,recorded on their book with my cell #. I requested the banking details, and sent via sms with no further instructions. Made the payment 2 days in advance. I call the shop on Friday, 30th Oct to check if everything is ok. Was told I can come collect the cake, it is ready.. I got there and the DRAMATIC and EMOTIONAL lady told me the cake was collected a few minutes before I got there. To cut the long story short, they made 2 bookings but ordered 1 cake from their baker. When I got there the cake had already been collected. Instead of owning up to their mistake, the dramatic lady became all emotional and defensive, coming up with unclear excuses (not sending proof of payment, as if I was instructed). She called the RUDE owner who doesn't know anything about phone etiquette (shouting, swearing, rude, not listening, assuming, dropping the phone on my ear) who said will come and attend to me. When she got there she did nothing except for shouting and not allowing me to explain the matter. I requested the refund, seeing that they didn't have any plan, and she said because I'm BLACK she will need to send via EFT to have proof that she paid me.