Manager REFUSES to honor advertised special!

I have been looking for about a week for a new Note4 to upgrade my existing MTN contract but all the stores in my vicinity did not and seemingly could not have or find stock. so finally I stumbled onto MTN's store finder and called an ever enlarging circle of dealers from my home (Randfontein). So I finally got to Clearwater Mall where Moe (he was very helpful and I am not complaining about his service) Told me that Yes they do have the note 4 and the 2 other devices I am looking to upgrade. So I braved Load Sheded traffic for almost a Hour and finally got there Signed for the upgrades and when I asked about the advertised \FREE Phone cover valued at R400"Santie was called She tried to ******** me by telling me the offer was only for MTN direct customers and not in store. So I pointed out to her the text said ALSO available from MTN direct. She rep**** that they did not have stock of the covers but I saw about 3 different covers for the note4 (some less than R400) and asked her to then give me one of them when she said no and simply walked away. When I tried to Talk to her afterwards she was \""Busy\"". **** poor service and utterly *** advertising false advertising!!"""