Incorrect Pricing on items shown in store

On 22 November selected a roll of wrapping paper (40m) which is displayed on special. Price at the till was more than double the price displayed. Explanation offered by Makro was that the rolls have different prices and we should take another one although the initial one taken is from the same selection. Obviously then left without buying any rolls and also left the other items at the till in the trolley as I could not trust that the prices are correct. No further assistance or explanation offered by Makro. I will not be able to have trust in the prices and/or specials displayed at Makro as it is not guaranteed that it will be what is payed at the till.