Virgin Mobile South Africa
Cell phone died, three weeks into contract

I upgraded my contract 1/12/2013, and got a new Samsung S3
My phone died 22/12/2013.
They took my phone in 7/1/2013 due to Christmas break, 21 WORKING DAYS CAN BE REQUIRED FOR REPAIR.
They promised me R500 credit in writing for inconvenience and waiting period end of January.
I still have not received that up until today, 4/6/2013.
The diagnosis on the phone is liquid damage which I dispute, as on most electronic devices and their batteriesis a little white sticker which will turn red/pink when exposed to moisture.
This was inspected in the shop on 7/1/2013, they then wrapped the phone in A4paper WITHOUT its back cover to send off???

We have reached a stalemate as they dont repair liquid damaged phones, they sent me pictures of the
"liquid damage" on 26/3/2013 and a letter dated 14/1/2013 stating this, HOWEVER not quite the same serial number as my phone, funny thing AS WELL, in my correspondence with Mr Pillay (1/2/2013) he said was waiting for a letter re: this situation, yet there was already one dated 14/1/2013???

I do have all the correspondence on email and was hoping you can suggest who might be able to take this further or advise me, I feel they are in breach of contract