Good service and false advertising

I went to OK Harrismith to buy a fridge and stove Sandy assisted me very well thank you Sandy however the competition promo that was on the stove expired March already and it wasn't remove it's actually a false advertising on specific brand or is that how the store tries to pull customers with false competition advertising I mean we all want to try our luck. I mean we need to be updated all the time maybe stuff should check such things daily because you will find them chatting and laughing so unprofessional minding their own business instead of customer service