Terrible service

I bought a Sony Xperia Z3 from orange and received it in February this year. Around the beginning of June I noticed the screen had a issue where it had a yellow spot, it seemed like the pixels were damaged. I logged a call and dropped my phone off at the Eglin street office myself on the 10th of June. This is a new phone which now is going to be repaired according to orange. I donot have any idea of how long is it going to take. The call center is useless as they dont have any notes on the system from the SA office and they dont even have the SA office telephone number. I have been emailing the lady in the Sandton office and she does not reply at all. I managed to find out who the repair center is and was told it is SSS cellular. They say that a quote was sent to Orange on the 23rd of June and have not received a response. This is pathetic service. Either you give me a new phone or you have my phone sorted and delivered before end of the week. i am taking this matter up with the CEO of Orange Stephane Richard