Ridiculous behavior from a corporate company.

On the 27-07-2015 i had upgraded my phone with vodacom online and the service was great (due to the fact that they were getting more money from me). I received the phone on the 30-07-2015. I initially wanted the huawei p8 but they did not have stock so i considered the Samsung Galaxy A3. When i received the phone i had taken it home and started testing the features and the front camera was/is not working properly, there are lines running through the the screen. I had contacted Vodacom online ,on there chat option, on Tuesday the 04-08-2015 and i was told that they could not help me and was given a number to call. I had called that number and was given another number to call by this time i was not happy because when i wanted to upgrade they did not give me a number to call as they called me almost immediately. I have been calling Vodacom for the past 3 weeks and not a single agent called me back and i was told on numerous occasions that i will be called back by the line manager.it is really disappointing that i have been with vodacom for at least 11 years and this is how i am treated when I am given a faulty unit. this is the worst service i have ever heard off and been a victim off