Absolute horrific service from cell c

Since i had taken up my contract with cell c i have had a problem with my phone battery life, not having the time to return to the store I had gone back only in November to book the phone for repairs,my phone was booked in for repairs on the 28/11/2015, on the 03/12 i received an sms saying my phone had been dispatched from the repair centre , not having heard anything i then went to the store around the end of December where i was told the phone still hasn't arrived and I will receive a call from the store when it does, around the sec week of January I had called the campus square branch where i was getting no answer , i then called the repair centre and was told that the store was credited already on the 07/12 and I should have been contacted to collect a new phone and was told the matter was sent to the store and i will get a call by the end of the say , i then went to the store on the 16th and was told by the guy that I will have feedback latest by the 18th , still no feedback.I logged a call with accounts department requested reversal of my December payment ,called again yesterday was told i will get a call latest end of day , today i call and get told its 4 working days