Phone wnt to repairs 2 times & still I have issues

Straight after the complaint I was contacted by Cell C to bring the cellphone in for repairs and was advised I would receive it in 21 days of which I waited longer. Secondly now again when you take a picture with the phone no images can seen on loaded on screen. Its clear customer service or even the value of those that make the organisation what it is today is not valued. Maybe an example like the 4x4 complaint with the broken phone on the corner of a Johannesburg CBD displayed with a Cell c Billboard would get the attention of the Mobile company to replace the phone and value the people that support them. My biggest question is this what are you guys doing right cause I am extremely frustrated and you guys are wasting my time seriously do you know how valuable my time is.