Recurring bad service

I renewed my VIP Red contract with Vodacom ( bad decision ). Requested the iPhone 6s which was delivered to me. The phone was overheating from day 2 and was reported to Bongani at Vodacom, who promised me a new phone ( ram couriers was to collect my damaged phone and deliver my new phone simultaneously ) Ram called to advise me of the collection of the damaged phone but did not have my replacement phone which Bongani had agreed to - I called , Moses (Bongani's boss) to get the matter sorted 10 Feb 16, promised to get my issue resolved, I'm still waiting