Cell C Insurance is so frustrating !!!!!

I got ****** and claimed for my phone from Cell C Insurance, the phone (Blackberry Z3) was delivered to the Ladysmith branch and I collected it on the 20th of July. When I switched on the phone at the store it was working but on the next day 21th July it started freezing and going blank (Blue screen) , I then called C Insure on the 24 th July to inform them of this and the said another phone will be delivered to the Ladysmith branch on the 28th however I am still waiting for it up until today!!!. I don't understand how I can be expected not to have a phone for more than three weeks (including the time I had to wait for the first one). I keep calling the Ladysmith store everyday and they tell me the same thing, the insurance company puts me on hold until I run out of airtime. Please fix this.