false/ incorrect price advertising

A 3 pce bedroom suite was advertised on bradlows morkels website for R999.95 cash. I placed an order on the 20/01/2015 and paid cash via EFT. The next day I placed another order for my sister as well with my details and also paid cash via EFT. Dorothy from bradlows called me today 25/01/2016 at 10h12 to say they can only give me the one set as they made an advertising mistake. I bought the two sets unaware that there was a pricing error and I should not be held responsible for their mistake. By the way that advertising was on the webiste for a whole week. I paid for two bedroom suites and AS A CONSUMER I WANT MY TWO BEDROOM SUITES.