NO FEEDBACK SINCE SENDING BACK FAULTY CELL PHONE

I ordered an upgrade cell phone, Microsoft Lumia, over the telephone. After 5 days asked them to fetch the cell phone as it was faulty, restarted 3 to 4 times per day by itself. Ram couriers - V2P***, fetch the cell phone on 17 August. Since then I have not heard from Vodacom that I now due for an upgrade again. Being stuck without a cell phone is no joke.