Complaint to Vodacom about this Samsung S6 Device

Please assist, i am having trouble shoot with Vodacom about my Samsung S6, within a space of 4 months and the 5th month it has been with Samsung repair store as well as Vodacom repair store problem is i only figured now 2 months ago that when i plugged in my device into my PC it does not register on my PC that its plugged in and i can work with it, i send it in for repairs and SAMSUNG repair centre replaced some parts and i went to collect, two weeks later Power button not working, i then went to Vodacom where i purchased the device and explained to them what the problem was and they then advise me to send the device to their repair centre and made a note for them that it recently came back from repairs so the booked it in ever since then its the second or the third week my device is still with them and they are giving me no joy out of the frustration i have been of having no phone for the purpose i purchased it for, no e-mails, no international calls, no whatsapp, no we chat, please help Samsung as i can see that Vodacom is not prepared or willing to help me about my device. i secalated the matter with Vodacom customer care still waiting to hear from them, please Samsung!