Denied to pay the price i saw

I am extremely disappointed by the service I have received in American Swiss Bela bela , I have went to the shop sometime in the week to check on their prices , I spoke to one of the lady and she advised me that all the rings that are highlighted in red are on special, I then returned to the store after 3 days I then chose the ring I saw the last time I was in the store ! Only to find out from the manager that I am not going to get it with the price I saw when i was in the store , I managed to take a picture from the window before I entered the store, when I entered the store I asked to take a picture she refused! I was told to do whatever I can she’s not going to give me with the price I saw ! Mind you I traveled over 100km to be denied to buy from TFG I am deeply disappointed by the way I was treated ! My rights were violated! The white lady who was infront of me asked to take a picture and she was allowed to , ist because I am a man? Or ist because I am black ?