British Airways false advertising

On Black Friday sale that was advertized as extended till midnight 25November i bought airline tickets to New York Advertized up to 30% off. I bought the tickets and payed on this great special only R29985.36 only to find out two weeks later i can buy the same tickets not on a sale for R29670.00 After contacting British Airways about the false advertising i was told by their representative i can either fly with British Airways or cancell and pay a R3600 penalty.If i knew it was not a sale i would never have bought the tickets! I can also fly much cheaper with South African Airways. People beware British Airways is only out to make money even if their advertising is false!