Multichannel DSTV taking consumers for a ride

My service was disconnected in February, I paid and reconnected on the 19th February but now this month on the 16th they were reconnected again, I called them to enquire because I understood to be paying for 30 days. The call center agent couldn't assist, I asked to speak to the manager but was told the manager will call me back but till now no call back as promised. I called again speaking to a different agent and the same was promised but no call back up to now, I was also given an email address to send my complaint to, I received a reference number but still no response.