False adverti*****t!!!

Today I bought a item from Makro online store. Where the pricing was much lower than it should be, but never the less, i bought iy. My payment went through AND I HAVE RECEIVED THE CONFIRMATION MAIL (according to Makro, once the confirmation mail has been sent the order is ACCEPTED by Makro). +- FOUR hours later I receive a cancellation mail stating that is was their fault and sorry. No phone call, just a ****** generic email! Why should we as customers pay for retailers mistake? Why don't they take it up with the department running the website? I will not leave this here, i have all my VALID proof. Really Makro, and have you seen your reviews and visitors posts on Facebook?