Highly disappointed at Telkom poor repairs service

I have bought the iphone 5c at Telkom in November 2014 on contract. I believe is still under warranty, so Itook it for repairs to Telkom shop Durban west street because it was not working. I was not switching on, it was just dead. I was not sure whether it was the phone or the charger that was damage that was the reason why I took it for repairs. My phone was booked in on the 29/07/2015 and was only returned to me on the 31/08/2015. The report back from the repairs was that there is nothing wrong with the phone ref no TRJ005184. The consults advised me to buy the charger and charge it and if it still not switching on i should return it to them. I bought the charger which was an extra expense to me and the phone was still not switching on. I again returned the phone on the 01/09/2015 to Telkom received ref no.TRJ006346. Today the 14/09/2015 my phone has been returned to me under same condition and this time around with no report back regarding the repairs. I'm sitting with the phone that is still died after a different consultant advise me to return the phone tomorrow with a proof of a new charger so my phone can be booked in the 3rd time . I am highly disappointed and frustr