Pathetic

My Husband returned his Xperia Z3 to Vodacom to have it fixed as the screen froze and he cant access his phone. When he went to Vodacom he was told that the screen is cracked and was given a quotation of R4500 to fix his phone so i however took it to Sony who then told me that it should be under warranty as the LCD isn't externally cracked but internally and isn't a result of malicious damage which is an issue they have been having with most of their phones even when you rub your finger over it it isn't a crack from dropping it as my husband put it on the night stand and when he woke up it simply wasn't working. My husband then went to Vodacom again to tell them what i was told since he is the contract holder and again they told him there is nothing they can do he has to pay for it to be fixed. My issue is who is wrong Sony the manufacturer or Vodacom the supplier cause you don't know what you guys are doing, I'm very annoyed and very irritated as we have been going back and forth. I need some realistic answers cause nobody seem to know their jobs