received a faulty phone

I opened a contract with cell c 5 months ago, I received a faulty phone. I went back to them the same month and explained that i received a faulty phone, they booked my phone in and sent it for repairs, when i received my phone i noticed in that week that the problem was not solved,i took my phone back again and explained that the problem was not solved the first time, they could not help me right away, i went back about 15 times to tell them something must be done about this problem, about two months went past when i eventually got help and could take my phone in,and i picked up water damage the week before. When i took my phone in to them to fix it for the second i explained that my phone picked up water damage, now they can not fix my phone, or give me a new one or cancel my contract and give my money back, because i will not pay for a phone that is not even working properly... something must happen and FAST!!!!<br>