poor services provided

my sony experia m2 was sent for repairs at cellc, I was told the turn around time would be 3 weeks, still the phone has not been fixed and no positive feedback has been given. the phone fell in the toilet on 28/02/2015 and sent for repairs 03/03/2015 and was taken out immediately, because the phone was advertised as waterproof this was not the case, the phone has been laying at the cellc store for weeks unattended must say this is not the service I expected. nobody is doing anything to assist me in this case, I have been paying for a cellphone which is not being used, not even a courtesy phone was provided the sony is still under warranty. I was told to send a letter to cellc telling them what happened exactly and they will send the letter to sony which I dint see how that is going to assist me, I have no energy to fight . I hope my complaint is taken into consideration.