Not receiving My replacement I Phone 6 64 gig

Hi my name is Peter Pretorius we handed in a faulty I phone 6 64 gig to the above store on the 18/5/2015<br> I received a letter by email to say that the warranty assessment has been approved on the 19/06/2015 by <br> Thato Modise @ the MTN repair centre and the collection no : col*** and that I should collect the new Phone where I Bought it.<br> The phone was bought from MTN Direct cel : *** and they should have delivered and new phone to me and this never happened.<br> I then got in contact with Nhlanhla Nkabinde whom promised to sort out the issue but nothing has happened to date.her email is as follows [Email Removed] cell no:***. <br> all of the above people refuse to give me the CEO cell and tel no for me to get in contact with him or her.<br> could you please assist in this matter for it is very bad service.<br> thanking you<br> Peter Pretorius<br> cell: ***<br> email: [Email Removed]