Appalling Service from Telkom

I had my iPhone 6s for a mere 2months when it suddenly switched off & never went back on again. In that 2months the phone had not fallen, had no scratches or any sort of damage inflicted by me. I took the phone in to the Walmer Park Telkom Store on 29 January & it was only logged on the fault-logging system a week later on 05 February. It had been sitting at the store and I had to be the one to follow it up else it would not have been logged. Telkom has now told me the phone has been deemed out of warranty as it has liquid damage. My problem is this so called damage could have been sustained while it was sitting at Telkom for a week because I do not know how it was stored, it was brought out to me in no covering what so ever when I went to query why I had not received any update SMSes. I have been without my phone for a month and Telkom could not even be bothered to even contact me themselves and inform me on what grounds they are rejecting my claim and what proof they have that the damage was not sustained while the phone was in their possession. I am appalled and disappointed at the service and needless to say - would definitely explore my options of cancelling this darn contract