I’m good enough to pay but where’s my stuff?????

Pick a Pay Hypermarket advertised Openview combo where you get the decoder together with a stick for R399 - offer valid until 18 Nov 2018. On 14 Nov I phoned them to make sure that the special is indeed on and that they have enough stock. They told me yes! I went there on 15 Nov only to find out that they don’t have stock and sold me the combo but without the sticks and said that they will phone me but I should collect before 23 Nov because then they will be busy. They never gave me a warranty or anything just my receipt and told me I don’t have to worry they have all my detail. I was assisted by Boitumelo, Linda and Rezan. I phoned twice that week - no stock. I phoned on 26 Nov again, Nkosana told me they receive stock on Tuesdays I must give him 48 hours then he will give me a call.... 48 hours after no call from them so I called him. Just to be told that they still don’t have stock... I explained that I am unhappy and that you should not advertise or sell me something if you don’t have it... he escalated the matter to the manager Rudi... who have not yet even bothered to phoned me! I phoned again today - still no stock. I feel it is unfair towards me- why advertise something and even sell it to me 2 weeks ago and I still have to wait for stock and no one does anything to get stock... pathetic service !!! I want what I paid for and I will not stop until I got it!!!! You are fast to take my money and make empty promises. I want my 2 sticks that I paid for 2 weeks ago - while you’re special was on!!!!! When will I receive it? Or should I keep complaining to receive it!