Not keeping to delivery date promised

I received a call from Elite Mobile, asking if they can assist with my Vodacom upgrade, she confirmed availability of Apple iPhone 6 Plus - 64Gig (Space Grey) I decided to proceed. She confirmed delivery time to be 24 and 96 hours. I received a text confirming order and delivery time as stated previously. After 96 hours still no Phone. On 09 Sept, I phoned them and was informed that the upgrade is still being processed. Due to my unavailability she then confirmed if I provide the delivery person with a letter authorising my wife to take delivery, the phone would be delivered by 11 Sept. She phoned back informing me that a third party cannot take delivery. I voiced my despondency with the poor quality of their service and her unsympathetic attitude. We agreed that the phone will be delivered on 15 September. I received (17:00, 14 September) a text message: \Dear customer Order Number U**** is still on backorder. Please contact *** for more options."I am livid with the quality of Elite Mobile service and will be reporting them to Vodacom today"