Telkom and any excuse to inconvenience the client

I have recently had an experience with Telkom regarding my phone. it is 4months old, not even, which still falls under the warrenty. the top of my phone has bent into an arch and over heats and they are now saying that it is a consumer caused problem. This phone doesn't have a single scratch on it, nore is it ever in my back pocket as it is so busy it is always in my hand. They want to charge me R 4 200 to repair it as they are saying the phone is no longer under warranty. A brand new one is going for just under R4000. They can not prove that it is consumer damage and are still not willing to replace the phone. even after many a reports on line which state this problem with the device. The branch Im dealing with, is at least willing to listen to my ranting over this issue however Telkom as a whole are not willing to do anything about it. As per the constitutional consumer act of South Africa, a client has the RIGHT to request a replacement device after it has been sent for repairs and still presents with the same problem.....the answers Im getting are, "well sorry we cant help you. please pay the amount to get your phone fixed. there's nothing we can do" I am exceptionally fuming over this as my from is barely 4 months old and they cant provide a service which they offer, why then offer a service?this is unacceptable and I will not tolerate this from Telkom or any other service provider as I am one myself and would not expect my clients to tolerate something like this from me. I suggest that someone from Telkom contact me and sort this out imminently.