Builders Warehouse Express Mafikeng

Went to buy floor paint (polyurethane)after seeing it on special..upon trying to buy it was told that the special only applies to the specific can of paint on that particular table..went to add another IDENTICAL one from the shelve as there was only one left on that particular table and it was still in stock, was advised that the special does not apply to the second IDENTICAL can of paint. Very unprofessional and misleading.