Price change before time

Hi, Today I went to Bradlows Newcastle to check if Lagos 3 peace Reclining lounge suit is still available ,I saw the stock on floor but the price is no longer the same as advertised on catalogue, price was R21999.95 written offer on catalogue valid from 13-26 November. Today's date is the 21st but price went back to R27999.95 and Lagos suit long was there at the store .Can anyone explain this to me.

Thank you.