Beyond a joke!!poor service

Hi On the 28th April 2016 I added a new line on my existing account with Vodacom at the cavendish 4u branch in Cape Town. Today is the 3 of May and yet to have an active line, I was promised 24 hours I should have an active iPhone 6s it's now the 6th day and still no active handset. The worrying part is that no one can tell me when the line would go active. So I have to just sit back and wait which is a joke. I have never received such bad service in my life. I call the store and keep getting promised that they will call me back and not once has this happens, there has been 1 helpful guy called Donavan and he doesn't even work in this store. Not even the manager can muster up a call back. Can some one please help me or give advice on what I need to do to get my phone active with Vodacom. Thank you