Poor Service on Samsung S4

I upgraded my Cell C contract on 20-Oct-13 taking a Samsung S4. My handset was only 2 weeks old when i started experiencing problems. It since been exchanged 6 times. <br> On 23-Dec-13 took handset to Reds Mall Cell C store PRE575797, after a month my handset was returned with issues resolved. To my disappointment and dismay I found that the handset was returned and not repaired as the issue with the handset still persisted. <br> Took back to Cell C store on 31-Jan-15 booked in 5-Feb-15 CLC***. <br> On the 10 Mar-15 spoke to a Sipho Sithole who promised me my handset will be returned. I called Sipho Sithole 18-Mar-15 only to get told my handset is still at Repair Centre and I will get a call back. I have been without my handset for the past 3 months. I contacted the CEO Escalation office, spoke to Sipho who adamantly refused to escalate this issue or pass on details who i can escalte to. <br> In all honesty I do not want this Samsung S4 handset, it has been a nightmare since I received it. I have been a long standing customer to Cell C and I find it unacceptable that their service is so Pathetic. I want adequate compensation for my time and for the frustration caused.