Bad customer service at Cell C

I have a contract with Cell C, having problems with the handset , an Iphone5 , it lost network , took it to the shop , first time they said I had to pay R5000 an amount that I can use to buy a new phone , I decided to take it somewhere and it was fixed . I experienced the same problem , decided to take it to them again , they again wanted me to pay , I did not have the money , I asked if they can give me a phone that I can use whilst the phone is booked until I get the money to pay , I got a very bad attitude from a lady who said she cant help me as she was about to go on lunch, as a result , I left the phone with them , they never called me , until I called them today ( 14.08.17 ) and found out that the phones is dumped somewhere in a locker , the reason why they said they cannot fix it I have to pay is that the Iphone has a 1 year warranty , I was never told about that and that they still deducting money from my account , when I do not have a phone , is that allowed. Hope my complaint will be dealt with in a speedily manner, I rely on the phone to do my work. At the moment I can’t work. I would like for this matter to be resolved , either by Cell C supplying me a phone or my contract cancelled and refunded with the money that they have been deducting since the phone broke. Regards