mis informed on paying R1418.34 for repairs

i purchased a Sony Ericson LT25i july 2014 at vodashop in kempton park and on the 22 Dec i took it in at vodawolrd due to it was not charging.In January I was contacted by a consultant from repairs informing me that to repair my phone i need to pay R1418.34 regardless the warrantee on the phone due to Sony Ericson doesnt provide them with parts to repair the phone,instead they have to buy the usb unit with that money from Sony to repair my phone.on the 23 Jan I paid the money and escalated the issue as i dont understand why my phone wasnt returned to Sony Ericson as it was only 6months old and was told I will be contacted by customer services.on the 28 Jan I returned the phone to vodawold as it was overheating and escalated the matter as I noticed that the had been tempering with the IME sticker as well as the amount that I was charged in order for my phone to be repaired and was informed that Customer services will contact me,thus far I am still awaiting the response regarding the escalations. the only responses I am getting from vodawold is the pogress regarding the repairs on my phone.