AirBnB haggled me

I had the worst experience on Airbnb trying to make a booking. I placed a booking for the festive season, paid the full amount for my booking and I thought everything was set for my holiday in December. A few moments later, the host emailed me asking for R2000 MORE after I had already paid upwards of R5000. I told them I couldn’t afford this and they then went on to go and cancel my trip, stating that they apologize but they just simply “forgot” to update their prices for festive holidays