New contract added but still no line activation

On Saturday, 30 August, we added a new line to our contract. We were told to email through our business letterhead so that the line can be activated. This has now been done three times and still no line activation. I've called the store daily since Monday, there is never any answer, you leave messages and no one gets back to you, it's ridiculous. This is probably the worst service I have ever received from a store. How no one can answer a call in a store is beyond me. Then when Dale emailed me back I was told he won't activate as our letterhead doesn't include the CC in the name shown on the letterhead, I explained that we don't trade using our 'CC' as our name, but still that's what he wanted so I sent him one, and guess what, STILL NO LINE ACTIVATION!!!