un-usefill customer service

I have been struggling with my Samsung data service as well as having poor signal the last couple of weeks. On Friday the 12/06/2015 I decided to make a phone call to Vodacom's customer service. the lady I've spoken to, told me she's unable to help me, and will give it through to the technical department. On Saturday morning I made my second phone call, to follow up. The guy I've spoken to, told me my problem never been logged on the system, and after 45 minutes on the phone, he told met he logged my complaint, and the technical department will call me with in 48 hours. Monday the 15/06/2015 I made the third phone call to Vodacom to follow up, and still no one could've assisted me with the problem. Tuesday I made the fourth phone call to follow up, but still no answer. Up until now, I've never received any phone call from the technical department!!! using my phone to do online trading as well, but because of the useless data network, I'm constantly getting disconnected from the network. I am fed up with the useless network and useless service. I am sure I am not the only one complaining about this. Tere's no service to complain of, because there is no customer service!!!!!