Very poor swrvice

Waiting two months now to get someone to help us to use Dstv internet. First modem was faulty. Sent us a new one, with a new simcard. All the lights on the router shows blue like it should be, but the 3 G light stay GREEN. The meaning of that is that the simcard has not been activate. I send emails, speak to people over the phone, everrytime the same from them.... unplug your modem. Take out the simcard. Do this, do that, and now I am so tired off sending emails, speaking to people online, and no one can help me! One lad online told me she can see the simcard has not been activated - the new one, and she did reported it, but it will take 24 houers to be fixed. Two weeks later, and the internet is still off. Please can you assist me with this, for they send me bills, and whatsupps with the messages that the data has been loaded on the simcard - but the simcard does not work. What to do now?