PATHETIC SERVICE..

I give my sony xperia in for repairs in September, they say they exchanging the device. After i make a payment they say that the exchanged device is faulty so they have to send it back to ARC and can't give a customer a phone which is faulty. Already TWO MONTHS GONE..After more weeks i go to collect my phone, I GET A DEVICE THAT IS FAULTY ''NOT AMUSING''..I then send it in again and when it's ready for collection i go to pick it up. They say there is no fault with device and give me a paper with battery usage tips #UNPROFESSIONAL..I sent an email complaint query and they logged it in on 1 Dec 2015..past 48 hours and no response, i call they tell me due date for feedback is 9 Dec 2015..past the due date 9 Dec 2015 they say the query is pending and delays take 14 days, 13 Dec no response yet...I've been a loyal vodacom customer all my life and this is the frustrating service i get. So many month's gone and no results..This is unreal..!!! MY HEART IS IN PAIN WITH ALL THIS DIFFICULTY VODACOM IS CAUSING ME..!!!!