No call back at ALL!!!! Been 6 months now

I have been phoning Samsung for over 6 months now! First It was because my phone NEVER as in NEVER has signal which I have never had a problem with, with previous phones in my house or anywhere I am. I was told to phone Vodacom as it is their problem and then Vodacom told me that I needed to phone Samsung as that is not their issue and Samsung needs to check my phone out. My phone also gets SO HOT to the extent that you cant even pick it up! I was phoned by someone at Samsung but NEVER got feedback from him other than to take my phone to your Care Centres to be repaired! I have also been to your Care Centre on 14th Avenue only to be told my phone cannot be fixed or looked at as it is a Vodacom problem! I AM AT MY WITS END with Samsung!!! I have been trying to get in contact with someone higher up in your repair centre on 14th Avenue for 2 weeks now as my phone screen has now also cracked 2 months ago and when I took my phone in the lady told me that they CANNOT fix my phone for me as my phone has no cover!!! It was 2 months before my 12month period with ADH finished!!!!! Why can my phone then not be fixed for me and looked at???????? I have email correspondence from someone at your head office telling me to go the care Centre in Dec to have my phone looked at and STILL GET TURNED away!!??? I was also told by someone at your call centre that if I was really struggling so much with my phone that they might be able to arrange a new phone for me if nothing can be done???? Now Im sitting with one VERY expensive phone that is TRUTHFULLY a piece of ****!!! And the service I have gotten from Samsung isn't far from it either!!!! I want an answer as to what will be done about my situation as I am done spending money on phone calls to Samsung trying to get service out of you!!!!!