bad service

I have sent in my Samsung galaxy note4 for repairs on the 08/07/2015 and so far the feedback I have received from the store is that the handset was sent in to the advance repair centre in jhb. I've been called +/- 10 times and every time I went to the store to collect my handset and on arrival found that the problem was not resolved and then off course it was booked in again and again and again and again. On the 05th of August I was informed via sms that an exchange handset was ready for collection at the store after arrival at store I found out that Vodacom offered me an service exchange unit which I was not willing to accept cause of the condition if the unit. I then gave them the option to either supply me with a new handset with same specs or cancel my contract. I then received the new handset but it was white instead of the original black handset i booked in. It has been a week later and I have had no feedback from Vodacom at all. This is totally unacceptable to be without a handset for this long of a period and i have been paying for a service which getting from Vodacom and this is not even taking into account the previous issues which i encountered with them.