Inefficient repairs and service

I sent my Samsung S5 for repair of damaged screen on the 02/01/2015. I received the phone back after many phone calls on the 22/01/2015 and my screen was replaced with a white one instead of a black. I sent it back for the correct colour and my phone was returned on the 16/02/2015 but my sim card or any other sim card for that matter was unable to work in the phone . I sent it back again and it was returned with the exact same problem. I sent it for the 4th time and when I received it back on the 12/03/2015 the camera is not working. Vodacom call centre is unable to help me and I am not willing to send my phone to the same repair centre. I paid for a contract for 2 months without having the phone. I have sent emails to Vodacom complaining about this but have only received automated responses that they have received my email. I cannot and will not send my phone again to same people and I am disgusted at the service received.