Canncellation of booking

SAA advertised discount flights on their website. I then made a booking for a flight to Abu Dhabi. I know received an email that there was an error on the website with regard to the price and that they are not honouring my ticket and refunding me . I have made other booking in the mean time. by them not honouring my ticket I will suffer losses as I have made other bookings with regard to accommodation and other flights . how can they do this after I was issued with an eticket. I must know suffer cause of their mistake