An angry paying customer

Native Child is a black owned business based in Roodepoort. I honestly thought they had good business until I placed an order with them. Its been 7 good business days since Ive been waiting for my order.... and everytime I contact them, they keep telling me its on its way.... how can a product from Joburg to Pretoria delay with 7days when they have promised to deliver in 4 business days!? Im so furious with the way they handle their business. And as for their consultant "Lerato"... shes hanged up on me twice when Icalled to enquire about my order. Now they dont want to cancel my order but they still unable to deliver!? This is so frustrating... what should I do!?