terrible service

3 months ago I sent a two month old Sony Xperia Z3 in to the repair centre for a issue with the screen.<br> <br> they sent it back to me twice after replacing a whole bunch of parts. on both occasions when receiving the phone back, the exact same problem was still there. the very next day on both occasions I handed the phone back to the mtn store dealing with the issue .<br> <br> now almost 3 months down the line that I have not had the device I am being told that they have finally found the issue and are replacing the screen. <br> <br> to this day it has been like drawing blood from a stone to find out what is going on with the phone, I have been in touch with Sony South Africa and stated that I am not happy with the amount of parts that have been replaced in the phone and I feel they should swop the device for a new one. however I was subsequently told that decision was in the hands of the repair centre (MTN HVRC).<br> <br> I do not feel that this is good service on the manufactures side and mtn who are representing them.<br> I am not happy with being given back my device that has been opened and fiddled with by numerous people and had parts replaced now on 3 separate occasions. I feel that this is a let a