Paying for a device I don't have

<p>March I app**** for an Iphone 6 plus at Telkom mobile Sandton City however the lady didnt give me feedback about the order i go back to the store 4weeks later only to find out she doesnt work there anymore , then on a second attempt Sebastian was helping me same issue i dont get a call or feedback i then decided to call telkom and they said the phone is at the shop. I got there and i was told sebastian is on training and they dont find my papers i then decided to cancel everything but end of April i get an invoice of R1800 thinking its a mistake end of may another invoice and money being deducted from my bank account. When i call i get different case numbers this is seriously getting out of hand . what is my next step?</p>