Sick and tired of faulty phone

I have been a loyal customer to vodacom for many years; however i have just had enough **** from vodacom and my faulty device . its been replaced and repaired software upgrades over and over but this device is not usable internet pages dont load. Phone reboots itself freezez terribly. Says battery is too low when its fully charged i am sick of paying for a device i cannot use. I need this contract to be ended or my phone replaced with not a refurbished device... My cell number is *** two weeks ago i received a call from rowan from your umhlanga call centre who ensured me he will assist in reporting this matter and contact me but as usual all your staff members service suck! Please look at my history of complaints before contacting me to tell me to book my phone in for repairs again as that will not be the solution . my alt contact number during working hours is ***