vodacom is useless

This is the third time that vodacom is sending me around. Vodacom sent me a message regarding my phone repairs and said they will correspond with me, they did not even solve my problem of my phone nor did they reply back to me on what can be done. I am without a phone for over 4 months and still paying my monthly contract of R500 . my Sony z2 is a water resistant phone and was advertised that it can take pictures underwater so I took a picture under water and my phone had gotten water damage.so now vodacom does not want to replace me with a new phone they say I should contact Samsung but I have a Sony phone. This just shows the intelligence of vodacom. And besides that why must I take my phone to another place when I bought it from vodacom ?vodacom is making their problems mine. I bought the phone from vodacom so I deal with vodacom if vodacom sells me a faulty phone its their duty to go back to their supplier and sort it out and not send a customer to vodacoms supplier. I dealt with vodacom and nobody else when I bought the phone. The consumer protection act that suppose to cover me as a consumer is being violated. If only vodacom had someone qualified to understand what's going