Dissatisfied loyal customer

Hello <br> Basically the short version-brand new Samsung S6Edge upgraded in May 2015. Constant signal issues-have taken this up with Vodacom after not having any previous issues with my S4. Its not the network. Went2Samsung constantia kloof in August. Dealt with manager Chen?. She explained common antenna issues with the S6Edge&the technicians would need2run all sorts of tests on the phone. Would take about2weeks. In my line of work I cannot afford2not have a loan phone so we agreed2wait on 1. Followed up numerous times in November,December&January after being informed loan units should be available in the new year. Got in touch with her on the 5th Jan 2016 only2be advised she no longer works4Samsung. She gave me the details of Taarique (I assume her replacement) explained my situation-he assured me feedback. Followed up numerous times in Jan&Feb- I expressed my dissatisfaction&got assurance of feedback&a call. Needless2 say nothing. I complained on social media sent,sent through a detailed email of my experience- got a standard response. Responded,a week later nothing. Complained again 2day&again got the same response. This is highly unacceptable&unproffessional.I need this sorted out