Black friday special

During the black friday specials Makro placed a 12000btu aircon on special. I had a question that I needed answered about the aircon on whether it is the complete inside and outside unit before ordering the aircon. Knowing there can easily come a misunderstanding over the phone, I requested a quotation online to make sure I have the correct details of the advertised aircon and send it to costumer care via the customer care email. The quotation does not show the discount and that is also explained when you request the quotation online and they will add the discount once the order is placed. So waiting for customer care to come back to my request (***) they only did so after the special has ended. Now going back and forth via emails and 18 emails later I still cannot place the order for the special price as was advertised when I did the request. So I would like to know what is the correct procedure to follow when you do have a question on a product that they advertise on special but they only provide feedback after the special has ended?