Total lack of service

I got a Sony Experia v on contract in Sep'13. I did this after extensive investigation into different phones and was sold the Sony with the explanation that it was a super hardy phone. I did request a cover and was told that Sony were not producing many because the phone didn't need one. The phones screen got a hairline **** in it on 3Dec'13. I took it into Vodacom and asked for it to be sent to Sony Joburg head office. This never happened. I managed to use the phone until the Mar '14 when the screen cracked further and became non functional. I once again returned the phone to Vodacom and asked them to send it to Sony. They gave me the run around from Mar until Oct at which point the phone was handed back to me still not having gone to Sony. I was given the name of the CT Sony Rep, Brent Thomas. He had me send the phone back into Vodacom with the expressed intention to deal with this issue. I got a call from Vodacom to say phone had been returned to the store and not sent to Joburg. I contacted the rep again and he said he would sort it. Nothing again. He then stopped taking and returning my calls. I have requested Sony to contact me through fb. I have had enough. Pls contact me,