Useless service

So frankly I've had enough now with Vodacom. My phone went in for repairs the 3rd time in 3 months. It just came back today and now yet again, screen isn't working properly and fingerprint sensor isn't working. Can't even start up to register a finger print. It went in on the 3rd time for camera repairs where the cameras just died. The mother board was replaced. I really had enough now and of all your excuses and half work repairs. I want this phone to be replaced immediately or contract cancelled immediately. Can't send it in for a 4th time within a day coming from repairs to be repaired again. This phone has been totally "rebuild" as per the job cards and your technical team can't seem to fix it since the first repair. An excuse of a service.