Unable to resolve the issue with my phone

I booked my phone in at Vodaworld, which is still in its first year of the contract as the screen was blank. After a couple weeks I got an SMS to say it will be returned not repaired. I then phone Vodacom to find out what the issue is and they said because its a crack LCD(when I booked it in it was not crack and the phoned was not dropped) and because they could not get hold of me I double checked the contact number and it was correct(so no one phoned me) they sent it back because I never accepted the quote. I have tried phoning and there seems to be no one willing to assist and they said they are sending this back to Vodaworld and I must contact them. I have tried searching the WEB site for contact details for Vodaworld repair centre and it seems the only way to contact them is to physically go to Vodaworld.