Delayed unacceptable service!!

I recently received a brand new iPhone 6 sealed in the box which was purchased from Vodacom.. Unfortunately for me I received a faulty phone. I took the phone to the I store in hope of them fixing the problem. They could not and thereafter issued a report to issue a swop out for a new phone. I had to send the phone back to Vodacom, which I did with the report from the istore. It has been almost a month and I have yet to receive anything. My phone was at he repair centre for over 2 weeks and only then did I receive a request for my apple ID which means the phone was just laying there! I am extremely appalled by the service, I usually am a proud customer of Vodacom but this is unacceptable! I have to wait without my phone which was brand new and was problematic! Extremely disappointed.