Vodacom service a disgrace

I would like to complain on the utter disgrace of a service that Vodacom gives you. I have a recent Vodacom upgrade contract with a i phone 6 device, the device started giving me connection problems and went to my local Vodacom shop. The devise was then sent to the Vodacare offices for repairs. Since that, the device has being sent back three times with the same problem , i find this unexceptable as my oppinion is that the Vodacom technicians are ***********. I perform standby duties and need my phone to be reliable as i thought as the the phone was about three months old. With all the up and down to the repairs centre i have being sitting without a phone for approx 8 weeks. Try and explain it to my company. I am utterly dissapointed in there service as i am a reliable customer for many years. Is that how Vodacom treats there customers. Please think twice before sending your phone away as it might not come back.