Worst online and customer care

Worst customer service, paid for order i didn't pick up, after I wanted to cancell it because of 2 for 1 specials that was not as specified. Watched staff packing order back onto shelves and they couldn't assist cancelling the order to refund my money ,rude and their system obviously has some kind of error, how difficult is the concept of 2 for the price of one, there should be 2 of the same item ,not 1 at a ridiculous price.