cellphone repair

I bought a Telkom mobile 3G AG Chrome+ cellphone on the 07/01/2015 at Ackermans. I used it for 3 weeks then it gave me battery problems which i reported at the store and it was booked for repairs by Thembisile she promised it will be ready in 3 weeks time. on the 19/02/2015 got a call from Thembilsile who said my was never collected from the store by supplier, i then went to the store to collect my phone out of frustration because i use it for bussiness purposes. i then took it back after a week as it was worse, today 14/03/2015 went to check progress on repairs, i spoke to (store manager) Owen Mdakane who told me the phone is been collected but Thembisile said it was still in the store. Owen told me stories about Telkom and their bad service. He gave me Simphiwe's mobile number Telkom rep who i phoned immediately with my own airtime, she promised to phone me back and she did not. Owen could not even tell me the person responsible with queries at head office. Owen and Thembisile are ***********, they have no solution for me they were only passing the buck to the service provider but i bought the phone at Ackermans. I have loss of income because of their incompetence.