Price changed after I booked

I booked a holiday yesterday for my family on the app the price showed R447 for 2 nights for 6 adults and 2 kids I paid for it and received a confirmation email . In the morning I received a email from the Owner of the property that I booked ( casa de Flores Port edward) she sends me a email saying that the Price is R2800 per night and she will not accept anything lower ,and I should cancel my booking .So rep**** that is not my fault and I will not cancel she then said she will not open her home to my family for the holiday. I also called customer care on bookins.com they took my information and sent me a email saying the was a error in the rate .