BAD SERVICE

I upgraded my contract and recd a SAMSUNG S6 on 23 April 2015. Went into Canal Walk on 25th to PORT IN my MTN Prepaid number. long story, 3 visits to store, 3 Nano sim cards purchased by me as well as over 25 hours on the landline to sort this out as well as email to CEO office. I was ported in on MONDAY 11 MAY 2015. So my phone has been used as its intended purpose , a mobile device for 3 1/2 days. This morning my phone after been fully charges wont switch on. Black screen. Called the After Sales Service *** 3 times to be cut off and on the 4th attempt get told that they cant do anything as the 7 days have expired for returns. So now have to go to repair store and no doubt wait another month before I will have use of this or replace mobile. So in 7 weeks(?) I would have used the phone as a telecommunication instrument for a total of 3 and a half days. My time and money spent so far on something that was not my error but TOTALLY VODACOM's far exceeds the value of the instrument and the contract. Yet I have no recourse as if has no exceeded 7 days. This business is operated by people who can not think for themselves and do not have their customers interest at heart.