Not again

i saw the auto dishwasher tablets that were on special were finished, was told to get a rain cheque, all good. Then I thought let me buy the sunlight 56 all in one whole waiting for the other ones which was priced for less than R100 (to me it was better than the Bio whatever that I could have went for) but I get home I see they charged me R165.99. I mean come on, I did double check and compared