Dollar General

On September 20 I went inside the store to get some chairs that were in the sale paper listed as buy 1 get 2 free when I get to the register the cashier said that I couldn't get the discount because it was not in the system and I showed her the sale paper where it clearly stated that the chairs were on sale. She then called her manager Sabrina Powell who also stated that the chairs were not in sale when I'm showing them the same exact chairs that are in their sales ad and still didn't get the chairs. There is no need to put out a sales ad if they are not going to sell the items at the price they listed.