Waiting for spares everyday!!

I took my phone to a Vodacom repair shop to be repaired. The phone was booked in at the repair shop on the 5th of July. On the 10th of July I was told to collect the phone as the repairs were finished. When I picked up the device it still could not function, I could not use it for that weekend. This is frustrating!!! I am forced to without a phone which I am paying for on contract!! On the Sunday the 12 th I took it back again. Now I am told they are waiting for spares, everyday. I receive five smses telling me the phone is awaiting spares on a daily basis. When I make an inquiry I am told to wait , Vodacom has 21 working days to fix the phone. This is not acceptable, for an entire month I do not have a phone!!! Are these spares being shipped from overseas??? this is the worst service ever!