3rd TIME to WRITE A COMPLAINT!!!

This is the 3rd time I have to write a complaint. In addition to my previous complaint I received my phone back after so many people could not understand or knew what my phone was covered for or not. I got my phone back and the initial problem where the phones data connection and call drops has not been fixed. I sent in my phone again so they can try and fix it. I pay R 800 for this contract a month and has been sitting without this phone for nearly a month now. Why is it that it seems like there is a dismal of quality service and quality checks? Why was it not picked up that the phone is still not working? Do they just fix what they think is wrong and send it back??? I am absolutely sooo negative in regards to Vodacom, where a couple of months back I would praise this. All started when I got a new phone not even 3 months ago. Thank you for showing me your bad side. I think after all these years, it is time to test different suppliers once my contact expires. Wish it could be sooner!!!