worst service ever

I recieved my upgrade on my cellphone contract on monday the 16th of march 2015 wich worked for 1 day then i could not get any signal so i call the customer care and they informed me that is could be the sim card but said i should take it to my nearest store just to check the setting on the hand set my in the mean time the will go ahead with a sim swap and in the hand set is still faulty the will exchange it has it is a out of box failure which by law must be exchanged as per the consumer protection act i waa even prepared to drive to cellc head office and hand deliver the phone and get it exchange but no joy as cell c does not care about there little customers that have been with them for year then on top of that the customer care agents are arrogant for more info please e-mail me at [Email Removed]<br> I eveb have my OBF number<br>