Bad Service no delivery as promised

After numerous attempt to get my phone, we are now approaching the fourth week without a cellphone, Finrite (Natasha) promised me that i will receive my phone within 48 hours and those hours have gone by without a cellphone, When i contacted Natasha at Finrite all i get is problems and excuses that the supplier now have a backlog regarding the delivery of the handset, I have sent an email to Natasha asking her that What other efforts have she attempted to ensure that the phone get to the customer as per her email dated 15th November 2017, My understanding is that the Warehouse problem shouldn’t be the customers problem, I have been trying to make efforts on my side (at my cost) to dispatch a vehicle to go to the warehouse to collect the handset and a lady by the name of Thandeka will sign for it as per her authorisation and they still rejected my offer although i was trying to meet them half way, Not even Natasha's manager by the name of Diena wanted to speak to me.What Finrite is explaining to me is the problem and all I need is the solution to the problem.