bad service and incorrect billing

I logged a complaint last week with regards to my account billing and vodacom only tried contacting me once I was at work busy with a client and when I contacted the number I got back to the call centre and they can't assist me with the complaint logged. I received a sms once again from vodacom on Friday saying that they will be cutting my lines. I have never dealt with a company with such bad service. I need urgent response on this with someone that can actually sort out my account for me urgently.