False advertising and rude store manager

Went to your store in atterbury value mart after seeing and advert on atterbury value marts Facebook page of a kway jacket on sale till 2 June. I spoke to a sales assistant and she called the manager and he was extremely rude and said the special has finished long ago. I showed him the advert on my phone. He proceeded to take my phone and scroll though my Facebook and then closed it and said there's nothing he can do. Extremely rude and arrogant store manager. The manager should have apologized and given me the jacket as advertised!